Bart (Bob Hoskins) owns Danny (Jet Li). Danny is a human dog for Bart's extortion business. During a job Danny meets Sam (Morgan Freeman). Sam is a blind piano tuner living in a building with an antique shop.
Danny doesn't remember his mother. His experience with Sam and his step-daughter, Victoria (Kerry Condon) releases the memory that Bart murdered his mother while he was very young.
Bart and Danny have a showdown in the antique shop building. Danny wanted to kill Bart but Sam stops him. We end at Victoria's piano recital presumably in New York. Victoria plays the song that Danny remembers his mother played prior to her death.
Thanks Ann-Marie 'crappy' F!