The beautiful Esperanza is a super featherweight fighter, who is forced to leave the boxing ring after an unexpected injury. She decides to look for a new job to support her good-for-nothing boyfriend Quique and his mother. In her search for work, she arrives at the Quesada company, owned by the handsome Martin. The two meet by chance and fall in love at first sight. A widower, Martin has abandoned his love of car racing following the tragic death of his wife and is about to remarry the ambitious and frivolous Constanza...