 Winston Chuchill s right hand man Group Captain "Robbie" Roberts, who also happens to be a close friend of Hogan, is shot down, captured and brought to Stalag 13. However, it is all part of a Luftwaffe scheme to assassinate Churchill as Roberts is put in the cooler while an impostor is to escape and head to England to carry out the job. However, Hogan finds out what is going on and makes plans for the real Roberts to escape while the impostor stays in Luftwaffe custody.