The Wee Man

The Wee Man also called Gangster is a 2013 Scottish gangster film directed by Ray Burdis which depicts the true life story of Scottish criminal Paul Ferris. It stars Martin Compston and John Hannah.

In 1990 Glasgow, Paul Ferris Martin Compston is incarcerated at Barlinnie Prison in Glasgow. In his cell, he reflects on his childhood.One night, young Pauls father puts him to bed after he is awoken by an assault in a van outside. He tells young Paul how to survive in the world To always beware of strangers, to always be loyal, and to be a lion and avoid following others in his actions. The next morning, while walking his dog, Paul witnesses an armed robbery on a local offlicense by the Banks brothers, a crime family and infamous local hooligans, who later harass young Paul and murder his dog. ........

Source: Wikipedia