Years after fleeing his organized crime family's violent life, musician Stephen Finney (David Morrissey) returns home when his mobster father is murdered. Working on plans to open a jazz club, he soon finds himself sucked back into the world he escaped. While Finney's hard-nosed sister (Melanie Hill) seeks vengeance for their father's murder, his drug addict brother (Andy Serkis) creates new problems in this powerful British television drama.