Mari Tamaki, a hesitant second-year high school student, is plagued by the fear of failure, leading her to abandon her aspirations. However, her life takes a turn when she meets Shirase Kobuchizawa, who is determined to find her missing explorer mother in Antarctica. Shirase's unwavering resolve inspires Mari to join her in the pursuit. Alongside two other companions, the sociable Hinata Miyake and the reserved Yuzuki Shiraishi, the group sets off on a transformative journey that not only brings them closer but also challenges their perceptions of friendship and adventure.