Killers by Nature

Two former high school nerds set out to scare their former bully enemies. The nerds pretend to have become bloodthirsty killers, out for violent revenge. But the prank spins out of control and the two nerds accidentally kill one of their old classmates. Now, with a taste for murder, these two former wimps begin to annihilate, one by one, those who taunted them in high school. (official distributor synopsis)