Since he arrived in Sao Felix do Araguaia, in Brazil, the Catalan bishop Pere Casaldàliga fights for the disadvantaged and the indigenous peoples. Casaldàliga must confront the landowners of the region and rethink the role of the Catholic Church.
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.
Mario, a member of the terrorist group ETA during Franco's dictatorship, drastically changes the course of his life when, with democracy in place, the organization decides to continue killing.
