After Itch obtains an unusual rock, he's excited to discover it could be a powerful new element. But when his home is robbed, Itch realises it might be putting him and his family in danger.

When Flowerdew discovers the rock's true power, he arranges to ship it to Switzerland for further testing, but with the help of his friends, Itch manages to steal the rock back before it's too late.

Greencorp discover the rock's missing and Flowerdew goes to desperate measures to get it back. Itch has a run in with some of the Bikers, and Cake, sick with radiation poisoning, tells Itch the rock must be destroyed.

Itch, Lucy, Jack and Tim take the rock to the Mining Institute for further testing in a bid to help Cake, but the group risk losing the rock when the Bikers arrive try to take it.

After the group are rescued from the Mining Institute, they escape Seaburgh with Flowerdew and the rock, only to become stranded when Flowerdew steals the rock, leaving them helpless and lost.