Stiles appears alone at the doors of the emergency room the morning after the full moon, covered in blood with a deep slash torn across his left side. He's suffering from hypovolemic shock and barely conscious and he won't tell anyone what happened—not his hospital appointed psychiatrist, not his father. Not even his pack.
The list of suspects is disconcertedly short. There were only seven others in the woods with Stiles that night: Derek, Scott, Boyd, Erica, Isaac, Jackson and Allison. And none of them remember the night in quite the same way.
Derek thinks that the mating rituals are overly romanticized bullshit, but claiming a mate and defending them from challengers is something werewolves do, and his pack can't afford to appear weak after the fire. Especially not when Deucalion and his friends are in town for the rituals. Enter Stiles Stilinski, who offers to let Derek claim him so he won't be overrun at the ceremonies. Nothing goes as expected.