地球研究所向太空发离子光束，不料却把其它星球的动物及妖魔吸到地球来，最后还是透过星际鸭人把妖魔给打败。

On a desolate, Midwestern county road, a bound man crawls towards a remote postal box, managing to slide a blood-stained plea-for-help message into the slot before a panicking figure closes in behind him. The note makes its way to the county post office and onto the desk of Jasper, a seasoned and skilled "dead letter" investigator, responsible for investigating lost mail and re...