It’s New Year’s Eve and a group of hardcore fans have gathered for their annual viewing of the greatest film ever – The Poseidon Adventure, the story of the capsize of the SS Poseidon on New Year’s Eve, and the handful misfit passengers that decide to climb to the top of the ship – which is now the bottom. As the story progresses the viewers become one with the film. POSEIDON! An Upside-Down Musical is part parody, part homage – and a look at how movies can leave their mark on you.