Two friends, Jamie and Shaun, receive a message about a free house party. At the party, Jamie drugs Shaun's drink out of jealousy over Shaun and their friend Teri flirting, but Teri ends up drinking it and dies. Panicked, Jamie and Shaun dispose of Teri's body in a river. Months later, Teri returns as a vengeful spirit and kills Shaun when he is alone. Jamie later goes to the river under the influence of drugs and also sees Teri, making it easy for her to kill him as well, allowing her spirit to finally rest in peace.