Retired DI, Malcolm Bell, is bored. A chance meeting with a retired couple gives him the purpose he was looking for - investigating a cold case, which for him, is unfinished business. He sets out to uncover the truth behind the murder of a man supposedly killed by terrorists in Tyrone in 1988. The more he uncovers, the more dangerous life becomes for him and those closest to him. Aided by a host of unlikely allies, Malcolm must navigate the brutal complexities of the past and their impact on the present. But has he bitten off more than he can chew?