A deranged scientist in South American successfully cross-breeds a rat with a monkey, creating a creature with poisonous teeth and claws. The creature, named Mousey (Nelson De La Rosa), then runs amok and kills some young models who are on a photo shoot. When one of these women (Eva Grimaldi) is reported missing her sister Terry (Janet Agren), along with a reporter (David Warbeck) go in search of her, following the trail to the scientist's old house deep in the jungle. Also with Werner Procath.
Nelson De La Rosa died at the age of 38 on September 22, 2006 of heart failure.