As Cassie's visions become more intense and frequent, she starts to question her own sanity. She begins to see glimpses of a mysterious figure in her visions, a shadowy presence that seems to be guiding her towards the next victim.
Desperate for answers, Cassie delves into her own past, uncovering dark secrets and traumas that she had long buried. With the help of her estranged sister, Sarah, Cassie starts to piece together the puzzle of her visions and their connection to the murders.
As the body count rises, Cassie realizes that the killer is someone from her past, someone who holds a grudge against her and is using her visions to exact their revenge. With each murder, Cassie's guilt and fear grow, knowing that she is inadvertently leading the killer to their next victim.
In a race against time, Cassie must confront her own demons and come to terms with her troubled past in order to unravel the mystery of her visions and stop the killer before they strike again. Will she be able to save herself and those she cares about, or will she fall victim to her own dark sister?