Sam and Cole find her and manage to save her, locking her in the bathroom until she can change back. A desperate Cole tries to call Isabel but since she's still upset at his rejection, he leaves 20 voicemails on her machine, the last one simply, 'I wish you'd answer.' Grace is chased into a sinkhole by Shelby. Grace turns into a human and manages to call Sam, but by the time he arrives for her, she has already turned back. Sam's final words are, 'I will find a cure. Cole then gives Grace his DNA and she shifts, escaping out the window. Isabel shows up and creates a distraction to get Grace's parents out of the room. He comes to the conclusion that she needs to turn. Cole realizes that, because Grace was bitten but didn't change in a set amount of time, she's dying. When Grace's health worsens, Sam and Cole take her to the hospital where her father punches Sam. After spending a day together, during which Cole admitted his famous past to her, they almost slept together until Cole rejected her, not believing he was good enough for her. Isabel and Cole later kiss again when he's warming up in the bath and again when visiting her mother's clinic. Isabel and Sam find Cole having a fit and discover that he was experimenting with needles, trying to find a way to become a wolf.

She leaves one night and Sam's ecstatic to see her. After returning from hospital, Grace makes plans to go and live with Sam at Beck's house. They take Grace to hospital and stop Sam from seeing her. Grace becomes very sick and, when she cries in pain, her parents find Sam in her room. To hide her grief over Jack, she ends up kissing him but he disappears as a wolf again. After becoming human again, Cole turns up at Isabel's in search of clothes. A newly recovered Sam finds Cole transforming in Beck's house and realizes that he's one of the teenagers Beck turned for the future of the pack.

Wolves of mercy falls series