Alice, a sailor by profession, embarks on a journey as the second mechanic aboard the Fidelio, an aging cargo ship, while her partner Félix remains ashore. Upon joining the crew, she learns that her predecessor has recently passed away and is surprised to find that the ship’s captain is her first significant romantic interest. In her cabin, Alice stumbles upon a journal left by the former mechanic, filled with entries about technical issues, romantic escapades, and heartfelt emotions. To her surprise, these reflections resonate with her own life. As the ship docks at various ports, Alice navigates the challenges of working with an all-male crew and the turbulence of her own romantic feelings, striving to maintain her course.