While fixing Mrs. Brown's TV antenna, Tim accidentally cuts a live telephone wire which hits Martin, in turn turning him into a live telephone. Martin has to figure out how to disconnect himself back to normal before Mrs. Brown and Det. Brennan (who was called in to find Mrs. Brown's pocketbook) stop buying their explanations for the telephone ringing and mysterious voices. But before he does, Martin and Tim overhear on Martin's telephone a plot to steal the Vandeleer diamond. Now how to pass on the information to Det. Brennan without telling from where the information came.