The ship which supplies Anton Denikin with money, weapons and secret documents gets to the attention of different party units in a Black Sea resort. The small Bolshevik armed unit fights there against the British authority. Its aim is to subvert the supply of weapons to the White Army. The Bolshevik armed unit penetrates the ship, disarms the captain, takes away the money and booby-traps the ship. In order to baffle pursuit the group decides to escape through the swamps. One member of the group turns out to be a traitor. He steals the money. The rest of the group drowns in the swamp.