The Invitation (2015)

Will drives with his girlfriend Kira to the Hollywood Hills home of his ex-wife Eden, who is hosting a dinner party with her new husband David. After the accidental death of their young son Ty, Will and Eden divorced; Eden met David at a grief support group in Mexico. Their other dinner guests are Tommy, his boyfriend Miguel, and friends Ben, Claire, and Gina. Gina mentions that her boyfriend Choi is running late. Eden introduces Sadie, a girl she and David met in Mexico who is now staying with them.

Throughout the evening, Will wanders through his former home and relives memories, including Eden's attempted suicide. In the kitchen, Will witnesses Eden slap Ben when he makes a joke about her ideas on expelling pain. Eden and David's friend Pruitt arrives. David locks the front door, explaining that there was a home invasion in the neighborhood. Will goes outside for firewood and, through Eden's bedroom window, sees Eden hiding a pill bottle that he later learns contains the barbiturate phenobarbital.

David and Eden tell their guests about a cult-like group they joined, along with Pruitt and Sadie, called "The Invitation", which helps people work through their grief. David shows everyone a video in which the group's leader Dr. Joseph comforts a dying woman as she takes her last breaths. The guests then play a game of "I Want" in which Sadie kisses Gina, Eden kisses Ben, and Pruitt confesses to killing his wife and doing time in prison. David tries to convince an unsettled Claire not to leave, but Will challenges him. Claire leaves, accompanied by Pruitt, whose car is blocking Claire's. Will watches Pruitt take Claire out of sight to talk to her, and David confronts Will about being too suspicious.

After dinner, Will peers through a cracked door and sees Sadie make odd faces into a mirror. She makes eye contact with him, follows him outside, and startles him with an indecent proposal, which he rejects. Will talks with Tommy about the weird, unsafe atmosphere he feels at the party, but Tommy reassures him that it is natural to feel strange about visiting the house and that Will is brave for showing up. He returns to the party while Will stays outside. Will finally gets a cell phone signal and finds a voice mail from Choi indicating that he was at Eden and David's doorstep before the other guests. Presuming that David and Eden must have done something to Choi, Will angrily confronts the couple about their strange behavior and links to the cult. Choi arrives unexpectedly, explaining that he was called away by work. Will is embarrassed, but the others assume his residual grief over Ty's death is causing him to behave irrationally.

David lights a red lantern in the garden. Will finds a laptop with a foreboding message from Dr. Joseph. David and Eden pour drinks for the guests to toast, but Will smashes the glasses, fearing they are poisoned. Sadie attacks Will, who inadvertently knocks her unconscious in the scuffle. Gina, who had sipped her drink before Will's intervention, collapses and dies. David, Pruitt, and a recovered Sadie attack the guests, killing Miguel, Choi, and Ben. Will, Kira, and Tommy flee and hide in the house. Will overhears David tell Eden that they have been chosen and that finishing what they started is the only way they can leave the Earth and be free of their pain.

Will takes a fireplace poker from Sadie whom he finds dying of her injuries. Pruitt finds and attacks Will and Kira, who beats him to death with a wine bottle. Eden shoots Will, wounding him, then remorsefully shoots herself in the stomach. David stalks the survivors with a knife, but Tommy disarms and stabs him to death. Eden apologizes to Will and asks him to take her outside. Will, Kira, and Tommy carry the dying Eden into the garden, where they hear sirens and screams and helicopters overhead. They see more than a dozen nearby homes with red lanterns and realize other cult members have carried out similar plans.