 One minute the New Yorker advertising expert Jim Ferguson is at a business party -- the next he finds himself way back in 1917 in a plane fight during ww-i. Mr. Raymond explains to him that he has a time-twin, to whom he s relocated in space and time whenever one of them is in trouble. So he has to help his twin, biplane pilot Biggles, in his attempt to destroy a Nazi-German super weapon, that could win their war. Of course it s hard for Jim to explain his sudden disappearances to his fiancée Debbie.