Inventorpreneur Fenton Kwan revolutionized nuclear energy by combining it with cutting-edge AI in one adorable package: the Kuju. But when Kwan and his company disappear without warning, society is left scrambling to keep the lights on. In Kwantum, Amateur tinkerer Ying and her loyal Puppycat Kuju, Luna, embark on a quest to repair the Kuju that keeps Ying’s ailing grandmother alive, but end up encountering a much bigger problem than a few busted bots.