
The unexpected adventures of children on a school cruise to Portugal and North Africa. In Tangier, Steve, whose hobby is detecting, suspects that a parcel carried by another boy is contraband. Steve and his pals get into trouble trying to get hold of the parcel, but, in the process they uncover and foil the plans of a passenger to smuggle a stolen painting back to England.

as Steve

as Ian

as Vicky

as Doug

as Jim

as "Hello"

as Ahmed Ben Ali

as Mr. Danvers

as Mr. Gordon

as Miss Fisby

as Mr. Parker

as Pierre

as The Captain

as An Officer