Mike has set up a video camera to capture the big moment, when he proposes to his girlfriend Abi. But it isn't too long until they realize they are not alone in the house.

Mysterious sightings of a large black panther-like creature roaming the Blue Mountains bushland have been reported for decades, with dozens of alleged encounters logged each year and an incident involving a local teenager in 2002 among the more sensational entries in the public record. A social-media obsessive from Western Sydney whose bid to capture proof of a mythical big cat on camera spirals into something far more dangerous.