Liz has travelled to the Trig to join Timus in negotiating a peace between the Sorsons and the Thargons.

John and Mike manage to evade the crossfire as the Thargon ship is destroyed. The Sorsons land on Earth where Vishishnu contacts the President about an alliance.

Andrew heads to the White House and manages to rescue Mike and Hsui Tai. On hearing that John is being held by the Federation, the trio decide to steal a Sorson ship to rescue him.

Earth faces danger from two directions: the Thargons and the Sorsons. The Tomorrow People must somehow defeat them both to save the planet.