Forgotten by the world, two figures float through the ages, their powers shaping the seasons and the heart. Jack Frost, the spirit of winter and mischief, yearns for belief. (Y/N), known as Cupid, the embodiment of love, understands his loneliness. But as a shadow from the past threatens the very foundation of childhood wonder, they are called upon by the Man in the Moon for a destiny neither expected: becoming Guardians. Can the boy no one sees and the girl who gives what she can't have protect the children's light?

Awakened from the grave after ten years, you are Valerie Parway, a witch pulled from the peaceful afterlife. Your skin is deathly yellow, your hair is white, and a strange hexagram marks your stomach. Forced into the custody of the powerful McCaster family, guardians of the portal your family once protected, you must navigate a world that has moved on without you, clear your name from the crime of necromancy you didn't commit, and unravel the mystery of who brought you back and why, all while hiding the demonic mark you now bear.

Melissa's ordinary life shatters when figures in black infiltrate her room, injecting her with a searing pain that leaves her on the brink of death. Rescued by apparent paramedics, she recognizes the eyes of one as her attacker. Whisked away in an ambulance, she discovers a shocking truth: her entire life was a lie. Her 'parents' were temporary guardians, and her real father, a secret agent, needs her to join a clandestine world she never knew existed. Plunged into a hidden base, Melissa must grapple with a fake past and a perilous future as she prepares for intense training as 'Agent Zero'.

Three centuries of unseen existence have taken their toll on Jack Frost. But when the Man in the Moon chooses him as a Guardian, Jack is thrust into a world he never knew existed. Alongside the legendary figures like Santa Claus, the Easter Bunny, the Tooth Fairy, and the Sandman, Jack must confront Pitch Black, the Boogeyman, who threatens to plunge the world into fear. Yet, a mysterious figure known only as 'Halloween' or 'Samhain' holds a crucial piece of the puzzle, a spirit chosen long ago, burdened by secrets, and perhaps the key to Jack understanding his own destiny.