The Fat Man involves a British MI5 undercover agent who is approached by himself with proof of the existence of a notorious World War 2 Nazi ‘secret weapon’ - The Tegal Project - discounted many years previously as German propaganda.
Following instructions given to himself during a strange encounter he is led to a meeting with a displaced group of SS soldiers - the ‘Ansatz Jägerretinue’ - Himler’s chosen guardians of the Tegal Project. Led by a Captain Haken - a group of Germany’s most notorious criminals.
