Siren

Siren is a 2016 American supernatural horror film written by Ben Collins and Luke Piotrowski, and directed by Gregg Bishop. It is the first spin-off film in the V/H/S franchise and feature-length adaptation of "Amateur Night", David Bruckner's segment from the 2012 anthology horror film V/H/S. The film focuses on Jonah and his groomsmen the day before his wedding, as they embark on a wild night of partying and debauchery. The party, however, becomes a savage fight for survival when they unwittingly unleash a fabled predator upon the festivities.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.