Modern AU. Arthur and Morgana are Metropolitan police officers drawn into a strange case involving robbery of ancient artifacts. Merlin is a graduate student at Imperial College studying the healing plants of Ancient Britain under Gaius – or at least that's what he tells everyone. Soon they, along with Gwen, Lancelot and Uther, will be facing a battle for the future of the country. Can they defend the realm from those who would seek to destroy it?

Recently discharged from the military after losing an arm during a training exercise, Erwin Smith returns to the BDSM club he once frequented, hoping to find someone willing to give him control. There, he is introduced to Levi, another former soldier, new to the scene and burdened with a past he's unwilling to speak of.