Motorcycle racer and mechanic Guy Martin makes a personal journey to the Baltic’s to find out the truth about the past of his Latvian grandfather Walter Kidals, who died nine years ago. The details of Walter's life had always been unclear, so Guy decided to find out what really happened, and uncovers an extraordinary life involving PoW camps, daring escapes, and constant threats of death and deportation. Guy also arranges to meet his Latvian cousins for the first time, and they help paint a picture about his grandfather's life. In 1944, at the age of 24, Walter was conscripted into the Latvian Legion and made to fight for Germany against Russia's Red Army. Guy uncovers an extraordinary life story involving prisoner of war camps, daring escapes, and the constant threat of death or deportation.