Kira Underlay decides she wants to "join the new club" by going into the water. Her dad tries to stop her, but the sheriff can't keep her from spending time with some dangerous companions. Russell runs some tests on Mariel, giving them new information about being a "hybrid."

The hunt is on for a pregnant Christina, with Russell, Szura and Underlay all looking for her. And Russell also wants to find Szura, who he believes killed Healy.