Despondent over a painful estrangement from his daughter, trainer Frankie Dunn isn't prepared for boxer Maggie Fitzgerald to enter his life. But Maggie's determined to go pro and to convince Dunn and his cohort to help her.

Chris, a former tennis pro, takes a job as an instructor and befriends his wealthy young student, Tom. After being introduced to his family, Chris is soon engaged to Tom's sister, Chloe. Despite the professional and financial advantages that this relationship affords him, Chris becomes obsessed with Tom's fiancee, American actress Nola.

Childhood friends Jacques and Enzo share a passion for the danger of free diving. Jacques, following in the footsteps of his father, who died at sea when Jacques was a boy, harbors a remarkable ability to adjust his heart rate and breathing patterns in the water, with his vital signs more closely resembling those of dolphins than men.

In Prohibition-era Chicago, musicians Joe and Jerry witness a mob hit, and flee the state in an all-female band disguised as Josephine and Daphne, but further complications set in.

Veteran catcher Crash Davis is brought to the minor league Durham Bulls to help their up and coming pitching prospect, "Nuke" Laloosh. Their relationship gets off to a rocky start and is further complicated when baseball groupie Annie Savoy sets her sights on the two men.