Siren (2016)

Siren is a horror-thriller about Jonah (Chase Williamson), an apprehensive groom-to-be whose bachelor party turns into a nightmare when he frees a seemingly innocent victimised girl locked up in a supernatural sex club. Her ruthless handler and proprietor of the sex club will stop at nothing to recapture his prize. Jonah struggles to rescue the girl only to discover it is he who needs to be rescued as he comes to the realisation that she is a dangerous fabled predator who has chosen him as her mate.