As the cartoon proper begins, a lion on roller skates (made of rabbits) rushes from his guard post atop a mountain, racing into a nearby village crying "Look out! The Old Man of the Mountain!" The lions warning sparks a mass exodus of the other animals who pack up their things and start to flee as the lion continues to warn "Look out! The Old Man of the Mountain!"
In time, Betty Boop emerges from a guest house in order to find out what is going on. She confronts a passing owl, who in song describes the Old Man of the Mountain, a predatory hermit who threatens the livelihood of the villagers, particularly the women. Despite the owl's warnings, Betty is curious and declares, "well, I'm going to see that old man of the mountain", and starts a trek up the mountainside. She passes several people fleeing from the Old Man, including a woman pushing a carriage with her triplets--who look suspiciously like the Old Man of the Mountain.
When Betty gets to the top of the mountain, the Old Man of the Mountain emerges from behind a rock. Over twice as tall as Betty, the Old Man backs the girl into his cave and, as Betty fights off his advances, begins to sing with her a duet of (Calloway's) "You've Got to Hi-De-Hi." Betty loosens up and joins in, and the two begin to flirt with each other. After his first verse, the Old Man looms menacingly over Betty.
"Whatcha gonna do now?" Betty asks, frightened.
"Gonna do the best I can," the Old Man replies, launching into a jazzy dance routine. The Old Man and Betty continue to dance together, but when the song is over, the Old Man makes a lustful grab for Betty, who runs for her life back down the mountainside.
The Old Man makes chase, and grabs Betty just long enough to catch hold of her dress, which Betty jumps out of. As Betty finds refuge behind a large tree in her underwear, her dress comes to life and slaps the Old Man before running back to its owner. Betty climbs the tree to apparent safety, but as the Old Man comes over and attempts to coax her down with (Calloway's) "The Scat Song", he picks the tree up and bounces it on the ground, causing Betty to slide down.
Before he can have his way with her, however, the animals from the village rally to Betty's aid and surround the Old Man, tying his arms and legs together by a tree. They then proceed to beat him up, tickle and humiliate him, thus extracting revenge for all the times he has made their lives a misery, with Betty watching the side with glee.
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