In a devastated future where the apocalypse threatens the Earth in 2555, a man who can travel through time is the last hope. His mission is to go back in time and prevent Gilbert Alibert, a deputy who is about to approve the construction of a nuclear power plant with the Chinese company Axomako, from causing a future catastrophe. Indeed, this decision would lead to the death of half of the world's population every 70 years, due to a radioactive cloud.