Stephen is determined to uncover what he hopes is the key to finding his father, and crafts a plan with the Tomorrow People that involves getting inside Jedikiah's head. Meanwhile, Cara and Russell encounter an uninvited visitor in the subway tunnel base. Stephen takes a risky opportunity and snoops around Ultra.

When John finds himself in a dangerous situation, Stephen is unable to help without revealing himself to Ultra. Not satisfied with the answer he has discovered about his father's disappearance, Stephen decides to take drastic measures with the help of his fellow Tomorrow People to find out the truth. Meanwhile, Cara and Russell negotiate a trade with Jedikiah, which ultimately makes Jedikiah take a big risk.

Stephen feels uneasy about his fellow trainee Hillary who has a secret agenda of her own. Stephen's mom wants the family to go camping including her new boyfriend Peter, whom Stephen seems to be having a difficult time reading. Knowing he is going to be out of town, Stephen asks for Cara and John's help to make sure that everything is ok with Astrid while he's gone.

Julian is back and angrier than ever, but when he gets caught by Ultra he is forced to strike a deal that could cost his and Stephen’s lives. John once again disobeys Cara’s orders when he learns the Julian has discovered the location of the Tomorrow People’s lair. Meanwhile, Astrid is plagued by nightmares after her near-death experience and turns to her new friend John for some comfort.

Russell realizes his alliance with The Founder was a mistake, and tries to make up for his decision by saving Cara from an Ultra ambush. Stephen understands that he must be the one to stop The Machine and the extermination of humanity, but he fears he may be too late. Russell offers up a plan to help Stephen, but he is going to need everyone’s help, including John and Astrid, if they are going to have any chance to survive. Meanwhile, Jedikiah offers John an interesting opportunity that could have them working together again.