Firi was deceived by her family and sold to the first prince, Terios, as a substitute as an experimental animal. During the experiment, Firi awakens as the master of the "Tarot Card of Destiny" in exchange for her death. With the power of the god card, Firi will carve out a new destiny together with the "incarnation of the card, Norn" and the "second prince, Aster", who is hostile to his brother, in order to stop Terios's cruel ambition and obtain true happiness!