Thorne Sherman and his first mate Griswold deliver supplies to a group on a remote island. The group, consisting of a scientist named Marlowe Cragis, his research assistant Radford Baines, the scientist's daughter Ann, her fiancee Jerry Farrel, and a servant named Mario, meet the captain and his first mate and advise them to stay with them in a house because a hurricane is approaching. Thorne goes but Griswold stays with the boat.