New Yorker Jim Ferguson (Alex Hyde-White) is going about his daily business when he suddenly finds himself zapped into the middle of a World War One aerial battle. It transpires that he is the time twin of the fighter ace Biggles (Neil Dickson), which means that whenever one of them is in trouble, the other is transported through time to help out. So, given that Biggles is about to embark on dangerous mission to destroy a German super-weapon, Jim better get ready for some serious time-travelling.