When a high-profile case goes wrong, undercover cop Laney Bird flees the city with her troubled son Alfie. Three years later, she's found the perfect haven in Sylvan, a charming town in upstate New York. But then the unthinkable happens: her boy vanishes. Local law enforcement dismisses the boy as a runaway, but Laney knows better. As a February snowstorm rips through the region, Laney is forced to launch her own investigation, using every trick she learned in her years undercover. As Laney's search for her son grows more desperate, everything depends on how good a detective she really is.