diff --git a/shiftregister/core/templates/base.html b/shiftregister/core/templates/base.html
index deca202..e8930b2 100644
--- a/shiftregister/core/templates/base.html
+++ b/shiftregister/core/templates/base.html
@@ -31,6 +31,14 @@
         margin-bottom: 1em;
     }
 
+    .message-incoming {
+        margin-right: 20%;
+    }
+
+    .message-outgoing {
+        margin-left: 20%;
+    }
+
     .sticky-nav {
         background-color: var(--background);
         margin: 0 -0.75rem;
diff --git a/shiftregister/team/forms.py b/shiftregister/team/forms.py
index 7faa094..2b7d4ef 100644
--- a/shiftregister/team/forms.py
+++ b/shiftregister/team/forms.py
@@ -23,3 +23,10 @@ class BulkMessage(forms.Form):
     checked_in_only = forms.BooleanField(
         label="Nur an Helfer*innen mit mindestens einem Check-in senden", required=False
     )
+
+
+class HelperMessage(forms.Form):
+    message = forms.CharField(
+        max_length=160,
+        widget=forms.Textarea(attrs={"class": "textarea", "placeholder": "Nachricht"}),
+    )
diff --git a/shiftregister/team/signals.py b/shiftregister/team/signals.py
index d9a308b..163784e 100644
--- a/shiftregister/team/signals.py
+++ b/shiftregister/team/signals.py
@@ -25,9 +25,8 @@ def populate_team_nav(sender, **kwargs):
         nav_items.append(
             {
                 "link": reverse("team:incoming_messages"),
-                "text": "Eingehende Nachrichten" + f" ({num_unread})"
-                if num_unread
-                else "",
+                "text": "Eingehende Nachrichten"
+                + (f" ({num_unread})" if num_unread else ""),
             }
         )
 
diff --git a/shiftregister/team/templates/helper_detail.html b/shiftregister/team/templates/helper_detail.html
index 318878c..103ea72 100644
--- a/shiftregister/team/templates/helper_detail.html
+++ b/shiftregister/team/templates/helper_detail.html
@@ -1,5 +1,7 @@
 {% extends "base.html" %}
 
+{% load humanize %}
+
 {% block title %}Helferdetails{% endblock %}
 
 {% block content %}
@@ -15,4 +17,43 @@
     </a>
 {% endfor %}
 </div>
+<h5 class="subtitle" id="history">Nachrichtenverlauf</h5>
+{% for content, created_at, read, incoming in history %}
+<div class="message{% if not read %} is-info{% endif %} mb-5 {% if incoming %}message-incoming{% else %}{% if not created_at %}is-warning{% else %}is-primary{% endif %} message-outgoing{% endif %}">
+    <div class="message-body">
+        <div class="is-flex is-flex-wrap-wrap">
+            {{ content }}
+{% if created_at %}
+            <div class="has-text-right is-flex-grow-1">
+                <small>{{ created_at | naturaltime }}</small>
+            </div>
+{% endif %}
+        </div>
+    </div>
+</div>
+{% endfor %}
+<form action="{% url 'team:mark_as_read' helper.pk %}" id="markAsRead" method="POST">
+    {% csrf_token %}
+</form>
+<form id="sendMessage" method="POST">
+    {% csrf_token %}
+{% for field in form %}
+    <div class="field">
+        <div class="control">
+            {{ field }}
+        </div>
+{% for error in field.errors %}
+        <p class="help is-danger">{{ error }}</p>
+{% endfor %}
+    </div>
+{% endfor %}
+    <div class="field is-grouped is-grouped-right">
+        <div class="control">
+            <button class="button" form="markAsRead" type="submit">Alle als gelesen markieren</button>
+        </div>
+        <div class="control">
+            <button class="button is-link" form="sendMessage" type="submit">Senden</button>
+        </div>
+    </div>
+</form>
 {% endblock %}
diff --git a/shiftregister/team/templates/incoming_message.html b/shiftregister/team/templates/incoming_message.html
new file mode 100644
index 0000000..48a6e9a
--- /dev/null
+++ b/shiftregister/team/templates/incoming_message.html
@@ -0,0 +1,23 @@
+{% extends "base.html" %}
+
+{% load humanize %}
+
+{% block title %}Nachricht von {{ message.sender }}{% endblock %}
+
+{% block content %}
+<h3 class="title">Nachricht von {{ message.sender }}{% if not message.read %} (ungelesen){% endif %}</h3>
+<div class="display mb-5">
+    <p>{{ message.created_at | naturaltime }}</p>
+</div>
+<div class="message mb-5">
+    <div class="message-body">
+        {{ message.content }}
+    </div>
+</div>
+{% if not message.read %}
+<form method="POST">
+    {% csrf_token %}
+    <button class="button is-info" type="submit">Als gelesen markieren</button>
+</form>
+{% endif %}
+{% endblock %}
diff --git a/shiftregister/team/templates/incoming_messages.html b/shiftregister/team/templates/incoming_messages.html
index 496d1cc..d113458 100644
--- a/shiftregister/team/templates/incoming_messages.html
+++ b/shiftregister/team/templates/incoming_messages.html
@@ -5,8 +5,9 @@
 {% block title %}Sie haben {{ num_unread | apnumber }} neue Nachricht{{ num_unread | pluralize:"en" }}{% endblock %}
 
 {% block content %}
+<h3 class="title">Eingehende Nachrichten</h3>
 {% for message in page %}
-<a href="{% if message.from_helper %}{% url 'team:helper' message.from_helper.pk %}{% else %}{% url 'team:conversation' message.sender %}{% endif %}">
+<a href="{% if message.from_helper %}{% url 'team:helper' message.from_helper.pk %}#history{% else %}{% url 'team:incoming_message' message.pk %}{% endif %}">
     <div class="message{% if not message.read %} is-info{% endif %} mb-5">
         <div class="message-header">
             {{ message.display_sender }} <small>{{ message.created_at | naturaltime }}</small>
diff --git a/shiftregister/team/urls.py b/shiftregister/team/urls.py
index f4b1558..2ca83eb 100644
--- a/shiftregister/team/urls.py
+++ b/shiftregister/team/urls.py
@@ -14,5 +14,6 @@ urlpatterns = [
     path("checkin/<int:pk>", views.checkin, name="checkin"),
     path("remove_helper/<int:pk>", views.delete_shiftregistration, name="unregister"),
     path("incoming/", views.incoming_messages, name="incoming_messages"),
-    path("incoming/<str:sender>", views.conversation, name="conversation"),
+    path("incoming/<int:pk>", views.incoming_message, name="incoming_message"),
+    path("incoming/mark_as_read/<int:pk>", views.mark_as_read, name="mark_as_read"),
 ]
diff --git a/shiftregister/team/views.py b/shiftregister/team/views.py
index 8b8a0ba..8ba4717 100644
--- a/shiftregister/team/views.py
+++ b/shiftregister/team/views.py
@@ -5,11 +5,12 @@ from django.db.models.fields import DateTimeField
 from django.db.models import F, Count, Q, ExpressionWrapper, Case, When
 from .models import ShiftRegistration, Room, Shift, Helper, Message, IncomingMessage
 from django.views.generic import DetailView, ListView
+from django.views.generic.edit import FormMixin
 from django.contrib.auth.mixins import LoginRequiredMixin
 from django.contrib import messages
 from django.db import models
 from django.core.paginator import Paginator
-from .forms import BulkMessage, HelperShift
+from .forms import BulkMessage, HelperShift, HelperMessage
 
 
 # Create your views here.
@@ -136,9 +137,36 @@ def bulk_message(request):
     return render(request, "bulk_message.html", context)
 
 
-class HelperDetail(LoginRequiredMixin, DetailView):
+class HelperDetail(FormMixin, LoginRequiredMixin, DetailView):
     template_name = "helper_detail.html"
     model = Helper
+    form_class = HelperMessage
+
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+
+        context["history"] = (
+            IncomingMessage.objects.filter(sender=self.object.phone)
+            .annotate(incoming=models.Value(True))
+            .values_list("content", "created_at", "read", "incoming")
+            .union(
+                self.object.message_set.annotate(
+                    read=models.Value(True), incoming=models.Value(False)
+                ).values_list("text", "sent_at", "read", "incoming")
+            )
+            .order_by(F("created_at").asc(nulls_last=True))
+        )
+
+        return context
+
+    def post(self, request, *args, **kwargs):
+        self.object = self.get_object()
+
+        form = self.get_form()
+        if form.is_valid():
+            Message(text=form.cleaned_data["message"], to=self.object).save()
+
+        return self.render_to_response(self.get_context_data(form=form))
 
 
 class ShiftList(LoginRequiredMixin, ListView):
@@ -212,5 +240,21 @@ def incoming_messages(request):
 
 
 @login_required
-def conversation(request, sender):
-    pass
+def incoming_message(request, pk):
+    message = get_object_or_404(IncomingMessage, pk=pk)
+
+    if request.method == "POST":
+        message.read = True
+        message.save()
+
+    return render(request, "incoming_message.html", {"message": message})
+
+
+@login_required
+def mark_as_read(request, pk):
+    helper = get_object_or_404(Helper, pk=pk)
+
+    if request.method == "POST":
+        IncomingMessage.objects.filter(sender=helper.phone).update(read=True)
+
+    return redirect("team:helper", pk=pk)