Ten years after the murder and the child's mysterious disappearance, a group of teens stay in the house for a weekend when they are terrorized by the ghost of the little boy.
The man and woman intend to abandon their respective spouses, but their plans are cut short when an unseen killer appears and murders them with a sledgehammer.
In actuality, the séance is an elaborate prank concocted by Chuck and Joey, but it succeeds in bringing forth the ghost of the missing boy, which appears as a towering man in a smiling translucent mask.
Discovering the fates of their friends, the remaining four teenagers decide to hold up in the house until morning, intending to set out for the nearest town afterwards.
He finds the boy's skull in a closet, a newspaper clipping mentioning his disappearance, and Carol and Jimmy's bodies seated at a table near a Satanic pentagram painted in blood.
Joni fends off the ghost long enough for Chuck to recover, and after a struggle, he grabs its own sledgehammer and bashes it in the face, seemingly defeating it.
gave Sledgehammer two and a half stars out of five, opening its review with, "whilst this early shot-on-video oddity certainly isn't going to win any awards it is cheesy (and even sometimes a little creepy) enough fun to keep most fans of the subgenre entertained.