After a successful limited release beginning on March 13, , the film had a wide release on March 27, It received acclaim from critics; the Rotten Tomatoes consensus calls it "smart, original and, above all, terrifying". That night, Hugh points out a young girl in the back of the theater. When Jaime says she cannot see the girl, Hugh becomes unnerved and asks that they leave.
On another date, Hugh and Jaime have sex in his car, but afterwards, he incapacitates Jaime with chloroform and she wakes up tied to a wheelchair in the Packard Plant , where Hugh explains that she will be pursued by an entity that only they can see and which can take the appearance of any person.
If it catches Jaime, it will kill her and pursue the previous person to have passed it on: Hugh. After they see a naked woman walking toward them, Hugh drives Jaime home and flees. The next day, the police cannot find the naked woman or Hugh, who was living under a false identity. At school, Jaime sees an old woman in a hospital gown walking towards her, invisible to others.
That night, someone smashes the kitchen window; Paul investigates but sees no one. Inside the house, Jaime sees a disheveled, urinating, half-naked woman walking toward her and runs upstairs to the others, who cannot see the entity. When a tall man enters the bedroom, Jaime flees the house; her friends catch up to her at a nearby playground. With the help of their neighbor, Greg Hannigan Zovatto , the group discovers Hugh's real name — Jeff Redmond — and traces him to his address.
Jeff's mother Ruby Harris answers the door and Jaime realizes that the naked woman she had seen coming for her in the Packard Plant was in the form of Mrs. Jeff explains that the entity began pursuing him after a one-night stand and that Jaime can pass it on by having sex with someone else. Greg drives Jaime, Kelly, Yara and Paul to his family's lake house and teaches Jaime to shoot a revolver. The entity arrives in the form of Yara and attacks Jaime on the lakefront.
