Two young boys digging in an excavator pit at a closed city playground unearth more than they expected. The body of a woman who was strangled has been buried in the shallow sand pit.

Homicide detective Susan Wycoff and her new partner, Donovan Casey get the call to investigate. Wycoff and Casey grasp at threads to weave together a clear picture of Diana Flaherty's final days in an effort to track down her killer.

All the while, Susan and Donovan ride an undercurrent of tension as they try to balance their work as partners and their deepening personal relationship.