Katie (played by Alexandra Lamy), who works at a chemical factory, is a single mother whose husband has left her, leaving her to take care of her 7-year-old daughter, Lisa (played by Mélusine Mayance). One day, the extremely depressed Katie meets Paco (played by Sergi López), a Spanish man who also works at the factory. Their attraction ignites quickly in their long absence of romance, and they soon fall in love, resulting in the birth of a boy named Ricky (played by Arthur Peyret). However, the realities of life gradually replace the romance of love, and Paco and Katie find themselves exhausted by work and the child, leading to frequent arguments. One day, Katie discovers swelling on Ricky's back, which causes a conflict between her and Paco, leading to their separation. Shortly after, Ricky surprisingly grows a pair of wings on his back, which astonishes Katie and Lisa. The mother and daughter decide to keep this secret to protect Ricky...