Stan and Ollie are unexpectedly reunited with their long-lost twin brothers, Alf and Bert, whose presumed demise is debunked by a photograph enclosed in a letter.

Alf and Bert, presently sailors aboard the SS Periwinkle, dock in the same harbor as Stan and Ollie's residence, accompanied by their wives, Daphne and Betty.

Unwittingly shouldering the consequences of Alf and Bert's debts, Stan and Ollie are ensnared in a violent encounter with Finn, culminating in threats of revenge.

As the chaos unfolds, Alf and Bert's misadventures lead to their arrest, while Stan and Ollie fall victim to mafia extortionists seeking the missing ring.

Amidst the ensuing turmoil, the twin pairs converge at the waterfront, where a fortuitous discovery of the ring and a spirited altercation result in their collective immersion into the water.