Kept young by an anti-aging serum, a group of almost machine-like human children believe they have been piloting the Ark since it left earth. Rachel tries to introduce the idea of 'playing' to them.

A year ago Oro of planet Exar crashed into the Ark, and with the help of Idona has been cannibalising Ark components to make repairs to his scoutship. Oro plans to take Idona back home with him - but then she meets, and falls for, Garth.