The old man is already married, living happily with his lovely wife. However, his heart is drawn to younger women—specifically, his son's wife. Seeing his daughter-in-law distressed over her inability to conceive a child with his son, the elderly man takes a bold step: using his favorite vibrator, he inseminates her himself, proving that an energetic older man can still compete with the youth. Along the way, the vibrator goes wild in an unexpected episode. Here begins the challenge of reviving his aging wife's youthful vitality.