diff --git a/common/src/main/resources/images/internal-mode-doc.gif b/common/src/main/resources/images/internal-mode-doc.gif
new file mode 100644
index 0000000..8c56b0d
Binary files /dev/null and b/common/src/main/resources/images/internal-mode-doc.gif differ
diff --git a/common/src/main/resources/images/internal-mode-ide.gif b/common/src/main/resources/images/internal-mode-ide.gif
new file mode 100644
index 0000000..731ef42
Binary files /dev/null and b/common/src/main/resources/images/internal-mode-ide.gif differ
diff --git a/introductionSection/section-info.yaml b/introductionSection/section-info.yaml
index 60a2fc3..abd0747 100644
--- a/introductionSection/section-info.yaml
+++ b/introductionSection/section-info.yaml
@@ -1,3 +1,4 @@
 custom_name: Introduction
 content:
   - welcomeLesson
+  - setupLesson
diff --git a/introductionSection/setupLesson/internalModeSetupTask/src/main/kotlin/org/jetbrains/academy/plugin/course/dev/setup/Main.kt b/introductionSection/setupLesson/internalModeSetupTask/src/main/kotlin/org/jetbrains/academy/plugin/course/dev/setup/Main.kt
new file mode 100644
index 0000000..4c3c92c
--- /dev/null
+++ b/introductionSection/setupLesson/internalModeSetupTask/src/main/kotlin/org/jetbrains/academy/plugin/course/dev/setup/Main.kt
@@ -0,0 +1,5 @@
+package org.jetbrains.academy.plugin.course.dev.setup
+
+fun main() {
+
+}
\ No newline at end of file
diff --git a/introductionSection/setupLesson/internalModeSetupTask/task-info.yaml b/introductionSection/setupLesson/internalModeSetupTask/task-info.yaml
new file mode 100644
index 0000000..af484dc
--- /dev/null
+++ b/introductionSection/setupLesson/internalModeSetupTask/task-info.yaml
@@ -0,0 +1,5 @@
+type: theory
+custom_name: Enable Internal Mode
+files:
+  - name: src/main/kotlin/org/jetbrains/academy/plugin/course/dev/setup/Main.kt
+    visible: false
diff --git a/introductionSection/setupLesson/internalModeSetupTask/task-remote-info.yaml b/introductionSection/setupLesson/internalModeSetupTask/task-remote-info.yaml
new file mode 100644
index 0000000..b785cb2
--- /dev/null
+++ b/introductionSection/setupLesson/internalModeSetupTask/task-remote-info.yaml
@@ -0,0 +1 @@
+id: 853483765
diff --git a/introductionSection/setupLesson/internalModeSetupTask/task.md b/introductionSection/setupLesson/internalModeSetupTask/task.md
new file mode 100644
index 0000000..56ab90d
--- /dev/null
+++ b/introductionSection/setupLesson/internalModeSetupTask/task.md
@@ -0,0 +1,12 @@
+To have access to some internal actions you need to enable `Internal Mode`.
+Please, follow steps in internal mode instruction configuration [by this link](https://plugins.jetbrains.com/docs/intellij/enabling-internal.html) and enable it in your IDE.
+
+![Internal mode documentation](./../../../common/src/main/resources/images/internal-mode-doc.gif)
+
+**Do not forget to restart you IDE after changing idea.properties file!!!**
+
+Also, following gif will show you how Helena done this in her IDE.
+
+![Internal mode documentation](./../../../common/src/main/resources/images/internal-mode-ide.gif)
+
+
diff --git a/introductionSection/setupLesson/lesson-info.yaml b/introductionSection/setupLesson/lesson-info.yaml
new file mode 100644
index 0000000..adc511d
--- /dev/null
+++ b/introductionSection/setupLesson/lesson-info.yaml
@@ -0,0 +1,3 @@
+custom_name: Setup before you start
+content:
+  - internalModeSetupTask