A tragedy has occurred. William, a Swedish engineer, wakes up in a hospital bed. The memory of what has happened is blurred, but the scream from his wife and the perpetrator's menacing voice echoing in his head. Once he decides to step up, he discovers that the hospital is deserted. Blood is smeared on the floors and walls, doors and stairs are blocked and everything seems to be pure chaos. What is going on?
One of the labs