Matthieu and Alexanne are living the perfect love story. But while the idyll of the first days gives way to routine, Alexanne gradually becomes aware of her condition.
In a post-apocalyptic Paris, Lisa and Mickaël are a couple of survivors who are looking for a solution to the shortage of insects. During one of their disputes, Lisa is stung by a venomous insect. They will have to cross the infested city to cure her.
