After years spent in Paris, Clotaire Sangala returns to his native country, Africa. Raised by a Chinese martial arts grandfather, convinced to have been found in a garbage can, Clotaire knows nothing of the glorious past of his parents. He will become "Black Snake", the masked and ultra-sapped superhero, liberator of the people against the dictator Hezekiah.

After ten years of doing nothing, Orel and Gringe are in their mid 30s and they struggle to finish their first rap album. Their texts are mostly sex jokes and booze stories and reflect the everyday life they have in a small town from France. The problem is that they never really finished a song and when their producers want to meet, they have to face a new challenge : finish their first song in the next 24h. Their old issues, the fear of failure, their alcoholic friends and annoying girlfriends won't help them to do so, or will they ?

After a gruelling final tour, Aurélien decides to settle in Japan with his wife Nanako, who is pregnant with their first child. As the young couple move into a traditional house in the Japanese countryside, Aurélien discovers an ancient suit of armour in a well, which is about to awaken strange creatures known as Yokaïs.