Stephen and his fellow Ultra trainees are given a test by Jedikiah to see who is worthy of becoming an Ultra agent, but not everyone is happy to work as a team. Cara is faced with a mysterious visitor from her past. Russell is sent on a dangerous recon mission that could force a clash between Tomorrow People groups. Meanwhile, John works with a new break-out.

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.

After getting some shocking news, Stephen attempts to restore order in both his worlds by making a deal with Jedikiah. With a new break-out on the loose, Cara and Russell try to lure him in but must contend with a trap from Ultra. Meanwhile, Jedikiah is closer to developing a new secret technology that could change his future.

Stephen is still walking a fine line with his Ultra partner Hillary, who continues to be suspicious of his loyalties. When the Tomorrow People and Ultra learn that there is a new break-out doing good for humans, they both want her on their side. Meanwhile, Morgan takes a risk and betrays Jedikiah’s trust to help the Tomorrow People, but what Jedikiah discovers from Morgan is an even bigger surprise.

Fed up with Jedikiah’s constant lies about his father, Stephen makes a choice about his alliances. Trusting in Ultra and Hillary, Stephen wants to bring in a break-out to Ultra to see if things have really changed, much to Cara’s dismay. Meanwhile, Stephen’s brother goes missing after Jedikiah forces Stephen to protect him.

Stephen’s hard work as a double agent seems to be paying off with a potential truce between the Tomorrow People and Ultra. Still untrusting, Cara sends Russell to meet with The Founder. Jedikiah is now on the run and is desperate to keep Ultra from discovering his secret. Meanwhile, with the help of Hillary, Stephen tries to contact his dad once again.

With the possible return of Roger on the horizon, everyone is concerned about the consequences if The Founder were to find out. Stephen now knows the truth about the machine The Founder has been using him to train in and needs John and Cara’s help to destroy it. Meanwhile, Russell and other Tomorrow People have lost hope they will ever find The Refuge and choose to head out on their own.

When the Tomorrow People learn the truth about the serum they were injected with, Stephen and Cara attempt to buy time for Jedikiah while he tries to create a possible antidote. Growing impatient, Russell and the other rogue Tomorrow People make a rash decision to sacrifice Roger to Ultra for their own safety. Meanwhile, John is having a hard time figuring out his new role and the only one he can turn to for advice is Astrid.