With the Hollow, the Mikaelsons' last enemies seemed to be banished. Still, Davina and Kol know that New Orleans will never be a completely safe place for their daughter. That's why they decide to take Lydia to the Salvatore Boarding School, where she will learn to deal with her legacy in a way that neither Davina nor the dangerous covens in the French Quarter can teach her. None of them suspect that an old adversary of the Mikaelsons has returned in an unexpected way and is intent on taking what is rightfully his.