French Atlantic coast. Near Future. Spring. The sea has become infested with jellyfish since fish can no longer reproduce.
Daniel Luxey, a biologist charged with unravelling this mystery, is obsessed with becoming a father, Statistically he has only 1 chance in 6,233.33 of meeting a woman likely to share his dream.
Lucie, a young woman with a sharp sense of humour, relieves her constant melancholy with a passion for the subtle language of piranhas.
When Daniel fixes a date with Lucie through a dating app, he comes across a strange fish caught in a net – a fish named Nietzsche – and circumstances finally become favorable for him to find what he has been truly lacking: love.