It's not horrible, but I can't recommend it. I saw this movie during our 5-hour flight to San Diego. The time passed but that's about all I can say for this movie, although I admit it's hard to enjoy anything during a 5-hour flight. I could tell my story, but no one would believe it. Because the plot is so outrageous that you can't believe it.
Reasonable believability is pretty much a basic necessity for any good movie.
Tim Roth plays a man who was abandoned at birth on a cruise ship in 1900. He is found as an infant by one of the ship's grunts who raises him in the belly of the ship. For his entire life he never leaves the massive ocean-liner. He steps up to the piano at an early age and immediately begins playing like Beethoven. He becomes a mysterious piano legend, and people from all over begin hearing about him and coming to see him play - but, again, he never leaves the ship.