Spenser (Mark Wahlberg), an ex-cop better known for making trouble than solving it, just got out of prison and is leaving Boston for good. But first he gets roped into helping his old boxing coach and mentor Henry (Alan Arkin) with a promising amateur. That’s Hawk (Winston Duke), a brash, no-nonsense MMA fighter convinced he’ll be a tougher opponent than Spenser ever was. When two of Spenser’s former colleagues turn up murdered, he recruits Hawk and his foul-mouthed ex-girlfriend Cissy (Iliza Shlesinger) to help him investigate and bring the culprits to justice. Inspired by Robert B. Parker’s Wonderland, a best-selling novel by Ace Atkins.