Unhappily married businessman Jeffrey Lynn dreams of escaping his troubles and drifting off to a desert island. Lynn's dreams come true with startling suddenness when he is lost at sea and presumed drowned. In fact, he has washed up on the shore of a Carribean island, where he falls in love with local girl Leila Barry. Hoping to start life anew, Lynn helps Leila establish a resort hotel on her little island. But the jig is up when our hero begins feeling guilty about the wife and kiddies he left behind. Filmed on location in Miami and Nassau, Lost Lagoon is trivial, but easy to take.