 In 1957, a zoologist traps a rare Sumatran rat-monkey on Skull Island and brings it back to New Zealand with the locals hot on his trail. Later, a young man falls in love and takes the young woman to the zoo. His overbearing and disapproving mother follows them and gets bitten by the rat-monkey. The monkey s bite turns her into a zombie, and her doting son has to keep her and the others she s bitten tranquilized in the basement while trying to preserve his love life.