Experiment #709

Four strangers are summoned to the basement of an abandoned house by a mysterious entity known only as The Sentinel. One after another, they are forced to witness heinous deeds they have yet to commit – and which will damn them for all eternity.

After a young man is bitten on the hand by a radioactive snake, his hand changes into a lethal snake head, which attacks everyone he comes into contact with. Also, his body becomes filled with snakes. Now, he must prevent himself from hurting others.