U.S. Marines, attempting to build a landing field on Halfway Island in the Pacific, unwittingly endanger the secret hideout of a mysterious figure known as The Tiger Shark. The Tiger Shark t... Read allU.S. Marines, attempting to build a landing field on Halfway Island in the Pacific, unwittingly endanger the secret hideout of a mysterious figure known as The Tiger Shark. The Tiger Shark therefore begins a program of sabotage and murder against the Marines.U.S. Marines, attempting to build a landing field on Halfway Island in the Pacific, unwittingly endanger the secret hideout of a mysterious figure known as The Tiger Shark. The Tiger Shark therefore begins a program of sabotage and murder against the Marines.