Student Jane jobs as an assistant for the animal researcher Phillip in a lonesome old house       They live alone except for the chimpanzees and butler Link a 45 years old very intelligent orangutan       Phillip wants to put Link to death       However before he can do this he's vanished tracelessly one morning       Link starts behaving more and more aggressive and prohibits Jane from using the phone or reaching the next village       When she punishes him by locking him out, he becomes violent