Lost Lagoon (1957)

Saddled with a loveless marriage and three ungrateful children, Charlie Walker (Jeffrey Lynn) dreams of escape. When he falls overboard on a boating trip and is presumed dead, his fantasy comes true. He washes up on a Caribbean island and meets a lovely local (Leila Barry). He gets a fresh start at life, opening a resort on his island home. But guilt and a few insurance agents may cut Charlie's dream short.