When Colin (Romain Duris), a wealthy bachelor whose hobbies include developing his pianocktail (a cocktail-making piano) and devouring otherworldly dishes prepared by his trusty chef Nicolas (Omar Sy), learns that his best friend Chick (Gad Elmaleh), a fellow acolyte of the philosopher Jean-Sol Partre, has a new American girlfriend, our lonely hero attends a friend's party in hopes of falling in love himself. He soon meets Chloe (Audrey Tautou) and, before they know it, they're dancing to Duke Ellington and plunging headfirst into love. Their whirlwind courtship is tested when an unusual illness plagues Chloe; a flower begins to grow in her lungs. To save her, Colin discovers the only cure is to surround Chloe with a never-ending supply of fresh flowers.