Marcel (Charles Michael Davis), still angered by recent events, refuses to help Klaus (Joseph Morgan) when a gruesome discovery is made in the Cauldron. Rebekah (Claire Holt) is on alert when she uncovers the remnants of a sacrifice down by the docks and immediately realizes that it's the work of a dangerous warlock from their past. Meanwhile, when Elijah (Daniel Gillies) gets some information that Rebekah may be in trouble, he and Hayley (Phoebe Tonkin) set off to find her. At Rousseau's, Cami (Leah Pipes) comforts Marcel, who opens up and shares some details of his past with her, but things quickly spiral out of control when an unexpected visitor shows up. Finally, a violent confrontation ensues when Klaus faces off against a powerful force with an unmatched advantage over him.