Koko, a young girl, dons the penguin coat gifted by her departed dad for every day. Despite being ridiculed by her peers, she clings to her father's narrative of being able to soar. One fateful night, Koko tails a mysterious feline and lands in the realm of ghouls. Unfortunately, the enigmatic land is under attack by its perennial adversary, and the clock is ticking. Can Koko spearhead the rescue mission and provide a timely lifeline for her newfound allies?