Kumiko learns that her holiday is canceled and she must travel to a mining colony on Io with her parents where she struggles to fit in.

The colony on Io is thrown into chaos; lava flows pierce the mining tunnels and the colony suffers deadly Earth tremors, destroying many of the life support domes.

While the adults assess the damage to the colony and stabilize the remaining life-support domes, the children search for their belongings and assist with salvage operations.

Inhabitants of the colony prepare for evacuation; Anna and Kingston desperately search for their belongings.

As the crew struggle to get the life support system back online, conflicts between Michael and Gerard cause further damage to the system.

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