Roo, Umba and Metric crash land on planet Fomóire, and a sentient prism gives them the power to transform into Holt, a superbeing that enables them to combat predators.
Roo, Umba and Metric find a signal box which they think will help them make contact with their home planet, Éire but are faced with a difficult challenge in order to get the signal box to work.
Roo, Umba and Metric struggle to get the signal box to work and meet a fiery rock creature who's determined to fight them away from his 'patch of the planet'
Umba needs urgent restoration as she's low on energy and nutrients, and a seemingly friendly Sorcerer leads Roo, Umba and Metric into a perilous situation.
The friends must navigate a deadly maze to find Fomóire Core Stone, which will activate a vortex for them to return home, but they begin to doubt if they can trust one another.
Jeannie becomes evasive when the gang quiz her about a strange skeleton they find in the earth, which leads to another surprising revelation about Jeannie's past.
Roo, Umba and Metric get closer in their search for their transport but Umba is weakening but a spidercrow has an interesting challenge for them if they want to proceed.
It's the finale of the Great Battle - can Roo, Umba and Metric combine all their strength and collective experience to save the universe from Branock and the Blight?
