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When a money-hungry real estate developer starts carelessly disposing of massive amounts of toxic waste in old mines, the consequences are both unexpected and disastrous. The chemicals cause the local mosquito population to morph into giant, terrifying beasts that are thirsty for human blood. It is up to local sheriff Roy Boone (Jim Youngs) and his girlfriend, Sarah (Tracy Griffith), to come up with a way to stop the killer bugs before it is too late. Wikipedia