Fact1: Eden is hosting dinner party with David, Fact2: Will and Eden divorced while trying to cope with Ty 's accidental death, Fact3: Sadie and David met while in Mexico girl, Fact4: Will witnesses In Ben when he makes joke about New Age ideas on expelling pain kitchen, Fact5: David and Eden tell guests about group
Output: Will drives with his new girlfriend Kira to the Hollywood Hills home of his exwife Eden, who is hosting a dinner party with her new husband David. Will and Eden divorced while trying to cope with their young son Tys accidental death. Eden met David at a grief support group, and their party will be the first time any of their friends have seen the couple in over two years. On the way, Will strikes and mercykills a coyote. Will and Kira arrive. David and Edens other dinner guests are Tommy, Tommys boyfriend Miguel, and friends Ben, Claire, and Gina. Gina mentions that their other friend Choi is running late. Eden introduces Sadie, a girl she and David met while in Mexico who now stays with them. Throughout the evening, Will wanders in his former home alone and relives memories related to Tys death, including Edens attempted suicide. In the kitchen, Will witnesses Eden slap Ben when he makes a joke about her New Age ideas on expelling pain. Eden and Davids mysterious friend Pruitt arrives. Will notices that David locked the front door. Will later goes for firewood and spies Eden hide a pill bottle through her bedroom window. David and Eden tell their guests about a group they joined along with Pruitt and Sadie called The Invitation to work through grief using spiritual philosophy. David shows everyone a video in which group leader Dr. Joseph comforts a terminally ill woman as she takes her last breaths. David turns away unseen visitors and explains they were strangers looking for a party nearby. The group play a game of I Want where Sadie kisses Gina, Pruitt confesses to accidentally killing his wife, and Eden kisses Ben. David stops an unsettled Claire from leaving, making Will think David is keeping the guests inside. David changes his mind, and Claire leaves, accompanied by Pruitt, whose car is blocking Claires. Will watches Pruitt take Claire out of sight to talk to her, and David confronts Will about his suspicion. During dinner, Will internally reflects on Tys death. While walking through a hallway, Will sees Sadie make odd faces into a mirror, and they have a strange poolside conversation, during which she sexually propositions him. After rejecting her, Will has a separate discussion with Tommy about the odd atmosphere in the house. Will finally gets a cell phone signal and finds a voice mail from Choi indicating that he was at Eden and Davids doorstep before the other guests. Presuming that David and Eden must have done something to Choi, Will publicly confronts the couple about their apparent cult brainwashing. Choi enters 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 Will to behave irrationally. Finding his sons room has been renovated and turned into an office, Will finds a laptop with an ominous video from the founder of The Invitation. David pours drinks for the guests. Will smashes the glasses, fearing they are poisoned. However, Gina drinks hers before Will smashes it. Sadie attacks Will who inadvertently knocks her unconscious in the scuffle. Gina suddenly collapses and dies, revealing that Will was right about the drinks. David, Eden, and Pruitt attack the guests, killing Miguel, Choi, and Ben. Will, Kira, and Tommy flee and hide in the house. Feeling regret over the violence of the killings, Eden is comforted by David, who assures her that what they are doing is the only way they can leave the earth and be freed from their pain. Will retrieves a fireplace poker from Sadie while she lies dying. Pruitt finds and attacks Will and Kira. Kira retaliates and beats him to death. Eden shoots Will in the shoulder, and herself in the stomach, severely wounding herself. David attacks Tommy, but Tommy stabs David to death. As she dies, Eden asks Will to come to her in her final moments and to take her to the backyard. Kira, Will, and Tommy reunite and head outside with the dying Eden. Tommy goes back inside for Miguels body. Kira and Will see helicopters flying above. As they watch, Will sees various homes with the same red lantern that David lit earlier in the evening. Will realizes that Los Angeles is erupting in chaos as other cult members throughout the city carry out plans similar to David and Edens. The two hold hands as the sound of sirens continues.