hile at a school science fair, Johnny gets a disturbing vision of a group of children getting extremely ill. Johnny persuades Walt to quarantine the building and eventually the children begin to get sick. Johnny realizes that without his help the children will die, including JJ. With the assistance of Rev. Purdy, Johnny must help Walt and the local health inspector, Jim Pratt, try to identify as well as find the source of the mysterious virus before it kills off the entire town.

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