Thirty-year-old Alice's occupation is rather unusual for a woman: she works as an engineer on a freighter. She loves her job and does it competently but even in a greasy blue overall a woman will be a woman, with her heart, her desires and her seduction - In such conditions can an all-male crew really remain totally insensitive to her charms? A situation all the more complicated as not only does Alice leave her fiancé Felix behind but she also discovers on board the Fidélio that the captain is Gaël, her first love.