The pregnant Irma retreats to her family’s remote forest cabin. Strange thoughts begin to consume her: she is convinced she will die the next day. The date coincides with the anniversary of her mother’s death—who also passed away on her 34th birthday. Not wanting to face the looming anniversary alone, Irma invites her half-sister and best friend to join her. However, a series of inexplicable events unfolds, making it seem less and less like a paranoid delusion that something terrible might happen to Irma.