A dog becomes a five-year-old girl and suddenly all her worst instincts are legal problems. Woo-Ri spends eight episodes learning that raising a human is just raising a puppy with thumbs and zero impulse control. The joke never gets old because Maru doesn't either, she stays exactly as chaotic as she was on four legs, except now she can open doors.
Woo-Ri's beloved poodle suddenly transforms into a five-year-old girl with no memory of her previous life. Now the pet owner becomes a guardian scrambling to keep her spirited charge from causing chaos in the human world. Maru retains every bit of puppy-like enthusiasm and curiosity she had before, except now she's navigating kindergarten, grocery stores, and the bewildering concept of clothing instead of fur. Her innocent observations about human behavior become constant comedy gold, while Woo-Ri learns that raising a child, even one who used to be a dog, demands patience she didn't know she had. What unfolds is a gentle comedy about the unexpected bond that deepens between them as Maru discovers what it means to be human. Her unbridled joy at small things, complete lack of social awareness, and tendency to get into trouble keep Woo-Ri on her toes. The series finds humor in everyday situations when filtered through Maru's fresh perspective, creating something warm and absurd in equal measure. It's lighthearted entertainment about found family and learning to see the world through someone else's eyes.