Worlds collide as Earth becomes a battleground in an intergalactic war. With Ursula dying, Michael trapped, and Moon helpless, Tom and Benny must form a desperate alliance with Varg and Lexi to stop Kooth's apocalyptic plan. As the countdown nears its end, can Tom become a hero like never before?

When students and teachers at Kings Park School start acting strangely, Tom and Benny fear their enemies have returned and soon suspect alien activity centred on the mysterious Room 12.

When Varg returns with a new wife, the Lady Lyzera, Tom, Benny and Ursula race against time to defeat the evil Prospector and escape the clutches of the Nekross.