The document describes a scenario where the Joker has placed bombs on two boats - one containing prisoners and one containing civilians. He has given each boat captain a controller that can detonate the bombs on the other boat. If neither captain triggers the bombs, the Joker will detonate them both. The captains are unsure whether to detonate the other boat to save their own, as that would mean killing innocent people. They discuss their moral obligations and options in this dilemma.