Featuring the voice talents of Lake Bell, Zoe Kazan, Michael Cera, Louisa Krause, Peter Stormare, Thomas Jay Ryan, and Grace Zabriskie, the film follows cryptozookeepers through a richly-drawn hallucinatory world as they struggle to capture a baku (a legendary dream-eating hybrid creature) and begin to wonder if they should display these rare beasts in the confines of a zoo, or if these mythical creatures should remain hidden and unknown.