Four children save money to buy a boat but are accused of boat stealing. When the boat is wrecked, they have to raise the wreck to prove their innocence.

Blinker, so named because he blinks whenever he has a bright idea for a new invention, is the son of an eccentric Professor who is developing a top secret Pulsar Crystal X. Blinker's inventions help him to be a successful goalkeeper and to keep an eye on The Masons gang - and some real crooks.