A 12-year-old orphan who has just inherited a fortune is trapped on an island with his uncle, a former British intelligence commander who intends to kill him. A young girl is the boy's only ally against the sarcastic uncle, who uses hypnotism, a pool of sharks, fire, and poisonous mushrooms as weapons.

Genres

Cast

Nigel Green

Major Kevin Harrison

Mary Badham

Chrissie

Pat Cardi

Barnaby Harrison

Linda Lawson

Justine

Nestor Paiva

Steward

William Castle

Russell Harrison (in car wreck) (uncredited)