As a young girl, Adelaide experienced a traumatic event. At an amusement park on the coast, she walked away from her parents and wandered into a mirror maze where she met her exact replica. Many years later, already with her husband and children, Adelaide arrives at her grandmother's house, which is next to the same ill-fated park, and from the very beginning the woman feels out of place. Her husband thinks that in such a beautiful place one should relax, not be nervous, but his opinion quickly changes when strangers in red jumpsuits with clearly aggressive intentions appear in front of the house.