After her son Kevin commits a horrific act, troubled mother Eva reflects on her complicated relationship with her disturbed son as he grew from a toddler into a teenager.

Colin is a Catholic and George is a poetry-loving Protestant. In Belfast in the 1980s, they could have been enemies, but instead they became business partners. After persuading a mad wig salesman, known as the Scalper, to sell them his leads, the two embark on a series of house calls