Obsession

Baron "Bear" Bailey has romantic feelings for his friend Nikki Freeman. They work at a music store alongside their friends Ian and Sarah. He returns home to find that his cat, Sandy, has died after accidentally consuming oxycodone. Bear shops for a gift for Nikki at a crystal shop and buys her a "One Wish Willow", a novelty toy that claims to grant one wish per person when broken. Later that night, after a group hangout, Nikki directly asks Bear if he likes her, which he nervously denies. Frustrated with himself, Bear breaks the One Wish Willow, wishing for Nikki to love him more than anyone in the world. Immediately after, Nikki reappears and asks to sleep at Bear's house, confiding that her estranged father is dying of cancer. In bed, she kisses him but then abruptly screams and pulls back.

The next morning, Nikki creates a memorial with Sandy's remains. She explains her erratic behavior as the result of taking MDMA, which Bear accepts, and the two begin happily dating. Suspicious, Ian calls Bear and informs him that Nikki told Sarah she saw Bear as her "little brother" shortly before they began dating, and that she lied about her father's cancer. That night, Bear wakes up to see Nikki watching him sleep, and she cries hysterically, accusing him of not loving her, disturbing Bear. The next day, Bear discovers that she made him a sandwich using Sandy's remains. Bear calls the One Wish Willow's customer support to alter his wish. The voice on the other end says the wish will only expire when he dies, then puts a hysterically screaming Nikki on the line, causing Bear to hang up in a panic.

Nikki accompanies Bear to a party at Ian's house that night, despite the latter's protests. During a Jenga drinking game, Nikki recites a violent, incestuous retelling of "Hansel and Gretel". Bear draws a block, daring him to kiss the person to his left, who is Sarah. Nikki ousts Sarah from her seat and kisses Bear instead. Suddenly, Nikki starts screaming and stabs herself in the face with a broken bottle. Bear drives Nikki to the emergency room but after she continues behaving erratically and refuses treatment, Bear brings her back home to recover. Later, Sarah texts Bear to meet her at the park. As Bear attempts to leave, a lucid Nikki speaks, claiming that her obsessive persona is asleep, and begs Bear to kill her. Bear refuses, offended that she would rather die than be with him. Sarah reveals to Bear that Ian and Nikki had been casually hooking up for the past two years, and expresses concern that Nikki is using him to get back at Ian. After Sarah hints at her own attraction to Bear, Nikki suddenly bursts through the car window and murders her by repeatedly slamming her head into a brick. She instructs a shell-shocked Bear to return home while she disposes of the body.

Bear buys the remaining One Wish Willows from the crystal shop in an attempt to reverse his wish but is unable to break one. He explains the situation to Ian and begs him to undo his wish. Ian, in disbelief, sarcastically wishes for a billion dollars instead, causing cash to rain from the ceiling. Bear returns home with the last One Wish Willow to get Nikki to reverse his wish. He discovers Sarah's mutilated corpse and finds Nikki wearing Sarah's dress and scalp; she then threatens Bear and herself at gunpoint. Ian arrives and is immediately shot dead by Nikki. Bear locks himself in the bathroom and intends to shoot himself in the head. Unable to go through with it, he instead consumes the last of the oxycodone, but quickly changes his mind and tries to induce vomiting just as Nikki breaks the last One Wish Willow. Under the wish's influence, Bear emerges from the bathroom and kisses Nikki before dying from the overdose. Heartbroken, Nikki prepares to shoot herself, but Bear's death causes Nikki's real personality to regain control just before she does. Horrified by the carnage surrounding her, Nikki wails hysterically.