The young researcher Lucía Farré, a specialist in molecular biology, has just lost the scholarship for her scientific project and the fidelity of her partner on the same day. As she tries to rebuild her life, strange events begin to occur around her. Without knowing it, she is immersed in the most important and long-standing conspiracy in history, that of a sect that has been controlling the destiny of humanity for centuries with the help of an ancient relic, a mysterious talisman that belonged to Alexander the Great. But why are they chasing her? What role does Lucía play in this ancient plot?