Keroppi and his frog friends stumble upon an abandoned mansion shrouded in mystery and strange occurrences. When they venture inside to investigate, they discover the house is genuinely haunted, filled with mischievous ghosts and supernatural surprises lurking around every corner. What starts as curiosity quickly becomes a thrilling adventure as the frogs must navigate through rooms filled with eerie happenings and unexpected scares. The tone balances lighthearted comedy with genuine spooky moments, never becoming too dark for younger viewers. The haunted house itself becomes almost a character, with each room presenting new challenges and supernatural encounters that test the friends' courage and teamwork. Rather than pure horror, the film leans into playful frights and comedy born from the frogs finding themselves in ridiculous situations. Viewers seeking charming adventure wrapped in supernatural trappings will find this theatrical outing engaging. The focus remains on friendship and bravery in the face of the unknown, with plenty of colorful animation and imaginative creature designs that bring the ghostly world to life.