The post-climate world is on the brink of annihilation. The UN has developed a form of time travel: a person's memories - and with them their personality - can be transported back in time to the person at the moment of their conception. The ingenious and narcissistic Henrik is sent back in time, on a mission to release the blueprints of a fusion reactor to the world in order to prevent climate change. But something goes wrong: Henrik is born in the wrong body and must learn humility as he lives a new life as a slow-witted handyman.