In 2094, Earth is ravaged by environmental devastation. Yuki Okita, selected as the operator of the "Dimensional Vibration Cannon" -an advanced time machine- at the Central Advanced Vision Institute of Cutting-edge Operations (CAVICO), faces a bleak future. The cannon can send data to the past to change the future. After witnessing the failure of CAVICO's ozone restoration project, Yuki and Dr. Juzo Mori decide to use the cannon to send a crucial message to 2024.