Maureen Cartwright is a personal shopper in Paris for Kyra Gellman, a supermodel. One night, Maureen video chats with her boyfriend, Gary, a contractor in
Muscat,
Oman, who encourages her to visit him, which she turns down. At Kyra's apartment, Maureen meets Ingo, a magazine editor and Kyra's lover. He tells Maureen that Kyra is planning to break up with him out of fear her husband will discover their relationship. Maureen talks about waiting for her twin brother, Lewis, who recently died of a genetic heart condition, to fulfill their pact to send a signal from the afterlife. Lewis's girlfriend, Lara, meets Maureen at Lewis' house which they plan to sell. Maureen spends the night at the house and discovers the bathroom's faucets turning on. She then hears a loud bang and encounters a female spirit who vomits ectoplasm. She quickly gathers her things and leaves. Maureen begins receiving text messages from an unknown sender who she initially suspects is Lewis. The messenger encourages her to indulge in forbidden desires, such as wearing Kyra's clothes. Maureen goes to Kyra's place to wear her clothes and masturbates in Kyra's bed. She falls asleep, is awoken by the same female spirit. The next morning, Maureen receives a hotel room key from the mystery texter. She visits Lara and tells her what she witnessed and that there is no longer a supernatural presence in the house. Donning one of Kyra's newest dresses, Maureen goes to the room to find it empty. She attempts to investigate the identity of the mystery texter by inquiring at the front desk, but the room was paid for in cash. Maureen drops off Kyra's jewelry at the apartment, cautiously opens Kyra's bedroom door, and finds blood all over the bed. She then goes into the bathroom where she finds Kyra's corpse on the floor. She flees on her motorcycle before returning to call the police. At the police station, she is interrogated about her relationship with Kyra but released. She ignores the texter who demands to know whether Maureen revealed their conversations to the police. Returning to her apartment, Maureen phones Gary to accept his offer to visit Muscat. She discovers Kyra's jewelry in her apartment, despite telling the police she left it at Kyra's place. The texter demands that Maureen return to the hotel room. She does, bringing the jewelry. At the hotel, Maureen seemingly recognizes a clandestine person entering the room. Elevators and doors in the hotel are then shown opening and closing for an invisible entity. Afterward, Ingo is shown leaving the hotel and being apprehended and beaten by two policemen. Meeting Lara at a café, Maureen tells her that Ingo confessed to Kyra's murder. Lara offers for Maureen to stay with her before joining Gary in Oman. The next morning, Maureen meets Erwin, Lara's new boyfriend, who knew Lewis. He leaves for work, and as Maureen sits in the garden alone, a ghostly figure appears in the kitchen holding a glass. The figure disappears and the glass levitates briefly before shattering on the floor. Maureen flies to Oman to stay with Gary in the mountains. At his retreat, she hears a noise and finds a glass floating in the air; it falls and shatters. She asks yes/no questions aloud, which are answered with one thump for "yes" and two for "no". Getting no response to "Lewis, is it you?", she asks, "Is it just me?", and hears a single thump. ==Cast==