A vengeful young man infiltrates a prestigious academy, driven by a long-held grudge against the father who abandoned him. Armed with a mysterious device that can freeze time, he begins to disrupt the lives of his half-sisters in subtle yet unsettling ways. The two students soon encounter inexplicable moments of disorientation and powerlessness amid their daily routines. As the first strange events unfold, their sense of safety within the school begins to erode.