When the Yamato lands on the Saturnian moon Enceladus to mine some much needed Cosmonite and investigate an automated distress call, Analyzer, radar operator Yuki and medic Makoto Harada, with Susumu as escort, encounter the remains of a crashed Earth ship. They are ambushed by androids (Garmiloids) sent by the Garmilans and must fight to escape. Help from the Yamato is delayed because they themselves, along with the mining crew, are under attack...