Speedy offers to stay up for the night in exchange for five pesos, and promises that he will wake Daffy up if he starts sleepwalking again.
Sure enough, Daffy begins sleepwalking and trips the bell, which wakes Speedy who then starts frantically ringing it himself to make it look like he was on guard.
Using his super-speed, Speedy gets to the construction site, and gets to the top of the skyscraper just in time to prevent Daffy from falling down a hole in the girders.
Daffy then nearly walks off the edge of the structure, but is woken up by the bell of an ice cream salesman at street level.
On his way down, Daffy manages to grab onto the minute hand of a clock built into the side of another building, but then the hour hand starts traveling around extremely fast, whacking Daffy on the head, then the clock explodes and throws him into another building, where he bounces off the canopies above its windows.