

The girl and man in black get into the elevator together. The girl says "oh, it's you." She tells the killer that she is worried about the two recent killings. She goes to wait for an elevator and appears to recognize him when he approaches. That evening, the killer (his face still unseen and wearing all black clothing along with black leather gloves with a Fedora hat), stalks the deserted campus and follows a girl who has just finished her aerobics routine. The killer has assembled the girl's severed head to the torso. Meanwhile, the unseen black-clad killer returns to his apartment and set out to get more pieces of dead women (while continually working on his human jigsaw puzzle). Sylvia Costa (Isabelle Luque), a Boston Globe reporter, tells Bracken about the rumors she has heard, leading her to believe that a maniac is running loose. Bracken explains to Holden that Mary is going undercover to pose as a tennis instructor at the college, and Kendall is going to assist her whenever he can. Bracken brings in Mary Riggs (Lynda Day George), a former tennis player-turned undercover-cop. Jennings (Gerard Tichy) arrives to provide a profile of the murder. "I wonder what he's doing with all the pieces that are missing" says Bracken. Both Bracken and Holden are stumped by the mutilated dead girl with her entire torso missing. The groundskeeper claims to the cops that he just discovered the body and had nothing to do with the killing. The police arrive and arrest Willard when he attempts to run. A little later, Willard arrives and turns on the pool lights where he sees Kendall run from the area and finds a bloody chainsaw and the girl in pieces with her entire torso missing. As the girl swims, the black-clad killer grabs her by her hair when she swims close to a wall and pulls her out of the water and attacks her with his chainsaw. The unseen killer finds the discarded note nearby and goes to the gym swimming pool where the girl is. In the campus library that evening, a girl gives a note to a male student, named Kendall (Ian Sera), expressing the desire to "do it underwater". Willard (Paul Smith) the burly and bearded groundskeeper is outside utilizing a chainsaw similar to the one the killer used. Bracken tells the Dean that they have no suspects and says "We're just out buying clothes without labels and trying them on for size". They talk to the college dean (Edmund Purdom) about the chainsaw murder and there were no witnesses and the girl's head is missing. Holden (Frank Brana) arrive to investigate the killing. Bracken (Christopher George) and his partner Sgt. The man dressed in all black clothing approaches and saws off her head with the chainsaw.

Nearby, an unknown person is seen working on the shrubbery with a chainsaw. Somewhere on a college campus, a girl is studying in the grass. Along with it is the remains of the nude jigsaw puzzle.

An unseen person enters a fancy apartment and goes to a closet where he recovers a box containing shoes and clothes, mostly covered in dried blood. In another closet in the hallway, they find the blood-splattered Timmy who screams "Mommy!" The policemen console him where he tells the officers that a maniac broke in and murdered his mother. Inside a closet, they find the woman's decapitated head. One of the policemen says "Something's been butchered up here. Two policemen force their way into the house and enter Timmy's bedroom where they find blood covering the floor. After phoning the house and still getting no response, she calls the police. A woman neighbor shows up at the house and knocks on the front door where there is no answer. He then saws her dead body into pieces and sits down to finish his puzzle. Tommy instead takes an axe from a closet and murders his mother.

She order her son to get her a plastic bag which to dispose of the remains. Very irrigated, she says she is going to burn it. A mother walks into a room and catches her son, Timmy, doing a jigsaw puzzle of a naked female. The synopsis below may give away important plot points.
