In the dead of night, the attic of a large house in the suburbs is brightly lit. This is Tom's workshop, where he is staying up late designing a mouse-catching system. Complex blueprints are displayed on the blackboard, and Tom is still performing the final calculations. Upon completing the last step, Tom, satisfied, drags his weary body back to bed, his mind filled with visions of signing contracts with wealthy investors, mass-producing the mouse-catching system, and ultimately becoming a generation's tycoon. As these fantasies alternate, Tom drifts into a sweet slumber. 　　 Just then, the sketch of a mouse on the blackboard suddenly comes to life. It draws a rope, slides down to the ground, finds and wakes the sleeping Jerry, hoping to make him aware of how terrifying Tom's design will be. Jerry and the sketch mouse quickly spring into action, while the sketch cat on the blackboard glares menacingly, intent on devouring them...