Life is a lock. "In the hallway, I pressed the play button on the answering machine for the umpteenth time. Patrick, I’ll be in Düsseldorf tomorrow, then in the Allgäu. I’m looking forward to the break with my family. Love you. - Love you. That’s something you say to your own mother, but not to the man with whom you’ve tried sixty positions from the Kamasutra." Patrick is convinced that Cora is cheating on him, and just now he has arranged to go with three so-called friends to cruise up the Havel on a houseboat. An idea that now seems as wise to him as buying land on Jupiter. The chaos crew: Henner, a Protestant pastor; Mark, a loser straight out of a book; and Simon, who loves to explain the world, is unreliable, and owns twenty-five cell phones. With the ship "Dahme," they set sail. Ten absurd, chaotic, yet wondrous adventures await them.