For profit, anything goes – even killing the mythical, harmless unicorn. But what if they're not so docile?

Elliot Kintner (Paul Rudd) and his teenage daughter Ridley (Jenna Ortega) accidentally hit a unicorn while en route to a crisis management summit with Elliot's boss, Odell Leopold (Richard E. Grant), and his family. The Leopolds seize the unicorn, and their scientists discover that the creature is endowed with supernaturally curative properties, which the Leopolds seek to exploit. However, as they delve deeper into their reseach, the unicorn's parents arrive and begin to slaughter one by one those involved in the exploitation of their dead foal.