Salty seadog Slate Shannon (Bogart) owns a Cuban hotel, Shannon's Place, joined by the sultry Sailor Duval (Bacall). Sheltering an assortment of treasure hunters, revolutionaries and other shady characters. Aboard his boat, the Bold Venture, Slate and Sailor experience "adventure, intrigue, mystery and romance in the sultry settings of tropical Havana and the mysterious islands of the Caribbean.