In rural New Zealand, a fifteen-year-old girl fights to keep her place among the pack of boys she has grown up with. As day turns to night, she falls into a power game with the pack's alpha - but it is the wrestle within herself that proves to be her hardest challenge.

Set in a run-down Wellington villa in 2003, CATERPILLAR follows three women living separate lives under one leaky roof. Sixteen-year-old Cassie is all bravado and vulnerability, drifting into risky territory as she searches for belonging. Her mother Maxine, 52, is a formidable single parent and filmmaker on the brink of a long-awaited breakthrough, finally offered a greenlight—if she can land a star. Holding everything together is Huia, Cassie’s grandmother, 80, whose life has been defined by quiet service to family and a private obsession with raising monarch caterpillars, dreaming of one day witnessing the legendary butterfly migration in Mexico.