Tom performs "Is You Is or Is You Ain't My Baby" to Toodles, which wakes Jerry, who was sleeping inside his mousehole (located in a mail box). Annoyed by the sounds, he pokes out of the mail slot and spots Tom playing the instrument. He goes back to his bed and covers himself with the pillow, however the sound waves from the instrument shake Jerry's mousehole, causing Jerry to fall out of bed (while still trying to cover his ears) and vibrate his way under a table, meanwhile a flower pot is vibrated across the table directly above Jerry's head and falls on him when both reach the edge of the table. Outside, Tom uses the instrument as a bow to shoot himself to Spike, who is still being tyed, tortures the dog by plucking its mouth, and runs back to the string instrument. The camera goes back inside Jerry's mousehole, whose stuff is messed up and broken by the vibration. Jerry continues being moved to under the mail hole's lid right before a match holding it falls, making the lid slam Jerry. Having had enough, Jerry throws off his nightcap, goes out of the mousehole to the kitchen and decides to get revenge by stuffing an iron into a pie which he then hurls at Tom through an open window; the cat is angered, but continues with a few more bars. Seconds later, he is hit in the face again – this time with a pie covered in whipped cream. Spotting Jerry, Tom chases him through the house.