Siblings Charlie and Kaycie O'Conner are reluctantly reunited after heartbreak - and something far more sinister.

What begins as a disturbing string of coincidences soon unravels into a blood-stained thread connecting them to their family's darkest secrets.

Behind the mysterious death of their mother lies a hidden world. A centuries old cult obsessed with conquering death, and willing to sacrifice anything to achieve it. As the O'Conners dig deeper, they unearth something that was never meant to be found ... and mark themselves as prey.

Some family legacies are better left buried.