You're Next (2011)

In the seemingly ordinary warm night, a lamb mask is creating the haze of killing, at any time, anyone, could become the next target of the masked killer. Young Irene (Sunny Vincent Sharni Vinson) is following her boyfriend Chris Piane (AJ Bowen AJ Bowen) back to his parents' wedding anniversary at the Missouri resort house. Cristian's brother and sister came to the party with their other half, and the family enjoyed themselves at the dinner table. Outside, however, there was another creepy sight, and several masked killers were eyeing the family covetously. Suddenly, his brother Drake was shot in the back, the killing began quickly, and other family members were frightened and injured one after another. At this critical moment, Irene turned against the guests, organized the whole family's defense, burst out amazing survival instincts, and the holiday house instantly turned into a bloody battlefield of life and death.