When Lily Milton is reported missing, her boyfriend, Parker Hubbard, points Detectives Olivia Benson and Elliot Stabler in the direction of Callum Donovan, Lily's downstairs neighbor and convicted bank robber who spent nineteen years in solitary confinement. During the investigation into Donovan's alibi, Lily is found alive, adding a surprising twist to the case and exposing more of Donovan's dark past.