The heroes face an impossible choice as they apply what they have learned so far to save the Earth. While Quill prepares to exact revenge on her captors, the friends are forced to fight Corakinus before he takes what he desires from April and Charlie in the Season 1 finale.
After Quill assigns the students detention, she goes with Dorothea and an alien shapeshifter to the metaphysical realms to find a way to remove the Arn from her brain.
When an asteroid comes through the rift and crash into the students' detention room, they soon find themselves at each other's throats, trapped in a void of no-time.
Ram goes with April to battle Corakinus. On Earth, Dorothea forces Charlie to choose between wiping out the petals or watching Matteusz die, but Quill has her own plans.
April struggles to break free of Corakinus' influence, and has to deal with a visit from her estranged father. Meanwhile, Charlie reveals the legend of the Cabinet to Matteusz, and bloodthirsty flower petals start covering London.
An alien plant race, the Lankin, come through the rift and seek out the strongest source of grief to feed themselves.
As Ram struggles to deal with the death of his girlfriend at prom, a new menace comes through the rift... claiming the skins of its victims.
Four students at Coal Hill Academy in London realize that something sinister lurks in the shadows... and only the Doctor can help them.