diff --git a/ircbot/plugins/rot.py b/ircbot/plugins/rot.py
new file mode 100644
index 0000000..62b051e
--- /dev/null
+++ b/ircbot/plugins/rot.py
@@ -0,0 +1,17 @@
+import codecs
+
+from ircbot import bot
+
+
+@bot.command('rot13')
+def rot13(bot, channel, sender, args):
+    """
+    Usage: {bot.trigget}rot13 <message>
+
+    Applies the Caesar cypher to the string and returns it. Currently only supports rot-13.
+    """
+    if not args:
+        bot.message(channel, f"USAGE: {bot.trigger}rot13 <message>")
+        return
+
+    bot.message(channel, "{}: {}".format(sender, codecs.encode(' '.join(args), 'rot-13')))