Huelva becomes the Spanish Casablanca, a true nest of spies from both sides, among whom young Lucía is forced to move. The protagonist has just turned 25 years old and has been hired by an English mining company to work in its offices as a secretary. There she meets the company manager, Peter, an attractive Englishman with a dark past who drags Lucía into an adventure in which she will be forced to take sides. When you're in the middle of a war, being neutral is not an option.