Mar Saura

A top-secret government institution uses secret portals to prevent intruders from the past from changing Spanish history for their own benefit. A diverse team composed of a 16th-century soldier, a 19th-century university student, and a modern-day paramedic travels through time to preserve the timeline, facing moral dilemmas and historical threats in every mission.

Valeria is a 17-year-old girl leading a normal life in Madrid until one night, after arguing with her parents about her report card, she is seemingly tempted by a mysterious young woman named Isis into committing a horrible act. Afterward, a stranger named Nathael appears to inform Valeria that he is an Angel, Isis is a Demon and that Valeria is a Malak, someone destined to become an Angel...if she can resist the temptations of the evil ones who are determined to make her fall. (imdb)