A zoologist goes to work for an expert in primates living in a remote house, where she finds an intelligent orangutan acting as a butler and two chimpanzees being used as test subjects. However, when the apes turn on their master, she finds herself trapped in the house. Horror, starring Elisabeth Shue and Terence Stamp.

Young graduate student Jane Chase becomes the new assistant to an eccentric zoology professor at the remote home he shares with two brilliant chimpanzees and an elderly orangutan butler named Link. But when one of the chimps is found dead and the professor mysteriously disappears, Link becomes dangerously aggressive towards Jane. Now, the time for “monkey business” is over and the true terror is about to begin.