Krista Beauregard, a part-time college professor, is delayed in rush-hour traffic one winter morning. Toronto police have cordoned off the intersection of Yonge and King Streets, and a bloody tarp lies on the sidewalk. Krista discovers that this incident has a personal connection: Gavin McLeod, her former top student, has died in a fall from a nearby office building in which he worked. The police quickly close the case, contending it was a suicide, although one of the investigating officers suspects more is at play. Devastated by the suicide ruling, Gavin’s father asks Krista to help him discover what really happened.