In a near-future world addled by climate change and inhabited by intelligent robots called hums, May loses her job to artificial intelligence. Desperate to resolve her familys debt and secure their future for another few months, she becomes a guinea pig in an experiment that alters her face so it cannot be recognized by surveillance.

Seeking reprieve from her recent hardships and her familys addiction to their devices, May splurges on passes for her family to spend three nights respite in the Botanical Garden: a rare green refuge where forests, streams, and animals still thrive. But when her children come under threat, May is forced to put her trust in a hum of uncertain motives to save her family.