Darkroom (2013)

After a deadly car accident with three victims, the traumatized Michelle is sent to a group therapy with Rachel. She recovers from the trauma and Rachel recommends that Michelle needs to work to prove that is healed. Rachel gives a card with a job opportunity at the company called "Darkroom Inc.". Michelle arrives at a mansion and is hired, but soon she discovers that she is trapped inside the house with other girls and three deranged and sadistic siblings that intend to purge her from her sins.