Lewis and Clark were famous comedians during the vaudeville era. Off-stage, though, they couldn't stand each other, and haven't spoken in over twenty years. Ben, Willy Clark's nephew, is the producer of a variety show that wants to feature a reunion of the classic duo. How will Ben convince the crotchety old comedians to put aside their differences before the big show?

An apparent murder-suicide in a hospital emergency room leads to an investigation by the on-call doctor, which reveals a plot by an insane toymaker to kill as many people as possible during Halloween through an ancient Celtic ritual involving a stolen boulder from Stonehenge and Halloween masks.