In the icy grip of a Minnesota winter, Shay O'Hanlon can't wait to close up her coffee shop and head out of town for a romantic getaway with her partner, Minneapolis detective JT Bordeaux. But an unexpected call shatters their plans—Shay's father has vanished. Initially dismissing it as another one of his periodic benders, Shay's concern mounts when she discovers his gun has been linked to a homicide. The victim, discovered encased within a massive block of ice, provides more questions than answers.

Now, Shay, alongside JT and their eccentric allies, launches into a desperate search to find her father and unearth the true culprit—racing against time as the trail turns cold and the clues begin to freeze over.