Three men attempt a prison break, but their plan derails when their boat falters near an island, where the caretaker recognizes the convict. A hostage situation erupts, leading to a tense standoff with authorities.

Three men break a convicted criminal out of jail. Their escape plan falters when their boat breaks down off Fort Dennison - "Pinchgut " - an island in Sydney Harbour. The caretaker of the island recognises the felon and the game is up. The four hold the caretaker and his family hostage, resulting in a deadly standoff with police.—grantss