Sunny Randall lives in Spenser's universe, but there are people in Sunny's life who don't appear in RBP's other series. Sunny's extended family connections are a big part of this: unlike Spenser, whose family is dead, and Jesse Stone, who left (most of) his ties behind on the West Coast, Sunny has to deal with her parents, sister, and ex-husband.
As in the Spenser books, there's a triad at the center of the series:
- Sunny. The new PI with something to prove.
- Spike. Sunny's best friend and enforcer.
- Richie. The ex husband that Sunny can't seem to let go.