When a blizzard traps two Rockton deputies with a newly discovered captive and a string of murders, they must uncover the truth before the killer strikes again. Casey Duncan and Will Anders, deputies in the off-the-grid town of Rockton, are forced to take shelter in a cave during a blizzard while pursuing a resident. Inside, they find a former resident who has been held captive for over a year. The discovery coincides with the appearance of two more female victims, raising the stakes for Casey and her colleagues to determine if an outsider is responsible or if the killer is closer to home, all while racing against time to prevent another death.

This installment in Kelley Armstrong's Rockton series continues the high-stakes thriller narrative that fans have come to expect. The premise sets up a tense situation where isolation and extreme weather exacerbate an already dangerous criminal investigation. Readers can anticipate a complex mystery with potential twists regarding the killer's identity and motives, likely involving the unique challenges of the Rockton community. The focus on Casey Duncan's investigative skills suggests a plot driven by deduction and suspense, aiming to keep the reader engaged until the final reveal.