It’s a cold, wet, February on Cape Cod, but a murder at the local toy store blows an especially icy wind through town—and through bike shop owner Mackenzie “Mac” Almeda’s sleuthing Cozy Capers Book Group.

Mac is extra busy these days as she and Tim do their best as working parents of a preschooler and a baby, not to mention Mac’s participation in the Cozy Capers book group. With Ella’s 4th birthday approaching, Mac uses her lunch break to shop for a gift at the Toy Soldier, which is run by June Fadiman.

Behind the counter is Zia Carven, a young woman Mac recognizes as a shopper at the Free Grocery food pantry Mac’s father sponsors. Zia finds Mac a kid-sized gardening toolkit Ella will love and offers to gift wrap it. In a rush, Mac plans to pick it up after work. But at 5:30, she finds Zia slumped over the counter, dead, dried blood on a toy rifle nearby. The first police officer to arrive is June's son, August. Then June arrives and is upset to find the police won't allow her inside.

Mac’s mother, Astra, confides that she’d been trying to help Zia, and now the police want to speak with her, which worries Mac. Then Mac discovers that Zia had been in town searching for her birth mother, which only multiplies the questions—and the suspects. Just one thing is certain: Mac and the book group will have to double down to find a killer who isn’t playing around . . .