Courgette (Zucchini) is an intriguing nickname for a 9-year-old boy. Although his unique story is surprisingly universal. After his mother's disappearance, Courgette is befriended by a police officer Raymond, who accompanies him to his new foster home filled with other orphans his age. At first he struggles to find his place in this strange, at times, hostile environment. Yet with Raymond's help and his new-found friends, Courgette eventually learns to trust and might find true love.

Diane Kramer is led by one obsession: to find the driver of the mocha color Mercedes which hit her son and devastated her life. With a few belongings, some money and a gun, she goes to Evian, where she's learned the driver lives.