There is a towering and lively performance by Burt Lancaster as Starbuck, 'The Rainmaker' of the title, a con merchant who is travelling from town to town selling his devices, until he meets and falls for Lizzie Curry (Katharine Hepburn), an idealistic and downtrodden daughter of a desperate (for rain) farmer father. Starbuck gives her, the family (and himself) hope, and despite some of the hammy acting by others, Lancaster and Hepburn manage to make the film interesting and watchable. Does it rain at the end? Do they live happily ever after? That would be telling.