A strange animal attack turns a botanist into a bloodthirsty monster.

Movie star Shelah Fane is seeing wealthy Alan Jaynes while filming in Honolulu, Hawaii, but won’t marry him without consulting famed psychic Tanaverro first. Tanaverro confronts her about the unsolved murder of fellow film star Denny Mayo three years earlier, and she decides to reject Jaynes’ proposal. When Shelah is found shot to death in her beach-front pavilion, Charlie Chan of the Honolulu Police investigates.

A ship sent to investigate a wave of mysterious sinkings encounters the advanced submarine, the Nautilus, commanded by Captain Nemo.

Construction workers in World War II in the Pacific are needed to build military sites, but the work is dangerous and they doubt the ability of the Navy to protect them. After a series of attacks by the Japanese, something new is tried, Construction Battalions (CBs=Seabees). The new CBs have to both build and be ready to fight.

In 1922, an Irish rebel informs on his friend, then feels doom closing in.