Kinsey uses a key to seek vengeance on a school bully. A troubled Nina finds a sympathetic ear. A long-buried memory casts Rendell in a new light.

Kinsey explores the sea cave with the Savini Squad in tow, Nina confronts Ellie over Joe, and Tyler sabotages his relationship with Jackie.

Tyler and Kinsey feel torn when they figure out why Nina is acting strangely. Bode meets Rufus and Ellie's houseguest. Dodge zeroes in on the Omega Key.

As pieces begin to click into place for the Locke siblings, Ellie opens up about her connection to Dodge, and Kinsey comes clean with her friends.

With Duncan's emotional state deteriorating, Gabe confronts one of the Lockes, Tyler surprises Jackie on her birthday, and Kinsey faces up to her fears.

Gabe insinuates himself into Tyler's search for the Memory Key as Kinsey resolves to find out what's going on with Eden. Bode visits an old friend.

Gideon forces Ellie to take him to the missing key, putting an old classmate's life on the line. Nina and Bode attempt to unlock the Harlequin Chest.