Bertram Oliphant 'Bo' West wants to clear his unjustly smeared reputation, so he joins the Foreign Legion—with Simpson his manservant in tow. But the fort they get posted to is full of eccentric legionnaires, and there's trouble brewing with the locals too. Unbeknown to Bo, his lady love has followed him in disguise.

Phil Silversas Sergeant Ernie Nocker
Kenneth Williamsas Commandant Maximilian Burger
Jim Daleas Bo West
Charles Hawtreyas Captain Gerrard Le Pice
Joan Simsas Zig-Zig
Angela Douglasas Lady Jane Ponsonby
Peter Butterworthas Simpson
Bernard Bresslawas Sheikh Abdul Abulbul
Anita Harrisas Corktip
John Bluthalas Corporal Clotski
Alan Hume