Javi is preparing for what he considers the most important audition of his life. His partner and friend Héctor is also auditioning. They are both applying for a place in a prestigious technique improvement program in Vienna. Hector's talent is overwhelming and this only feeds Javi's insecurities and, despite all his efforts, he can't believe in himself, falling into a spiral of self-destruction.
A soldier from the 15th century, a university student from the 19th century and a nurse from the present join the secret 'Department of Time', a secret department within the Spanish government with the ability to travel through time. Their mission is prevent changes in history.