As sleepy Sea Harbor, Massachusetts settles into the glow of autumn, a baby-on-the-way has the Seaside Knitters feeling warm and fuzzy. Only, these crafty ladies can’t get too cozy when sweater weather delivers an unexpected arrival—murder!
 
While no-nonsense mother-to-be Cass Halloran tries downplaying her pregnancy and her frequent doctor’s visits as an “older” mother-to-be, a softer side of the lobsterwoman emerges as she joins the Seaside Knitters in knitting an abundance of delicate hats and booties. But in contrast to the happy news, terrifying events unfold at the town’s art series that puts a real chill in their New England fall . . .
 
Izzy Perry’s husband Sam had reservations about inviting his one-time mentor Harrison Grant to speak at the opening reception, although he never imagined the famed and charismatic photographer would rudely embarrass his hosts that evening. But when a dead body turns up along the wooded shoreline the next day, startling secrets come into focus that could undo the tight-knit community of local artists . . .
 
With a mysterious murder pitting neighbors against each other, Izzy, Birdie, Nell, and a vulnerable Cass find themselves entangled in a dangerous hunt for answers. Can four best friends somehow tie together scattered clues and pacify a list of potential culprits before a cascade of fallen foliage buries the pièce de résistance of a ruthless killer?