Lacey Chu is a girl who codes. She has always dreamed of working as an engineer for MONCHA, the biggest tech firm in the world and the company behind the "baku"—a customizable "pet" with all the capabilities of a smartphone. But when Lacey is rejected by the elite academy that promises that future, she's crushed.

One night, Lacey comes across the broken form of a highly advanced baku. After she repairs it, the cat-shaped baku she calls Jinx opens its eyes and somehow gets her into her dream school. But Jinx is different than any other baku she's ever seen…He seems real.

As Lacey settles into life at school, competing with the best students in a battle of the bakus that tests her abilities, she learns that Jinx is part of a dangerous secret. Can Lacey hold on to Jinx and her dreams for the future?