Kumiko is unhappy to learn that her holiday is canceled and she must travel to a mining colony on Io with her parents where she doesn't fit in.

Violent earthquakes are destroying and destabilising the mines and Kumiko, Michael and Gerard must make a dangerous jorney to escape.

While the adults estimate the damage to the colony and repair the remaining life support systems, the children help with the salvage work.

While the inhabitants of the colony prepare for the evacuation, Anna and Kingston creep into locked areas of the colony, in order to save their belongings.

The crew struggle to get the life support system back online. Whilst conflicts between Michael and Gerard cause the system to be damaged further.

The crew examine a mysterious computer error that is having dangerous consequences all over the ship.

When Duffy arranges a health check, Kumiko sees this as an opportunity to let Michael and Gerard settle their rivalry once and for all in a match.