I got it

Even though Mickey's evening started slow and lazy, things get moving in a hurry when Minnie calls from outside the big dance, wondering why he's late. Luckily his best pal Pluto is happy to help wrangle the uncooperative evening wear and help get him out the door...without the tickets

Mickey, Donald and Goofy are a fire department. As you might expect, their attempts at fighting a boardinghouse fire are not particularly effective. They hear Clarabelle singing in the bathtub and rescue her, tub and all, against her will (she won't believe there's a fire).