For the similarly-named Donald Duck cartoon, see Sleepy Time Donald.
Tom and his cat friends—Butch, Lightning, and Meathead—are singing loudly at the crack of dawn. The cats drop Tom off at home; he yawns and stretches, now very tired from the night off. He climbs up onto the window ledge, deciding to sleep there. However, just as he drifts off to sleep, Mammy Two Shoes arrives and chastises Tom. Tom enters the kitchen and nearly falls asleep, until Mammy warns him to stay awake and keep Jerry out of the refrigerator, as she will kick him out of the house if she catches him sleeping. Jerry overhears Mammy's warnings and decides to make things difficult for Tom, encouraging the cat to fall asleep in order to get him thrown out.