"Before there was Light, there were Monsters." Joy Carter's peaceful life in Perdita is shattered when she receives a letter years after her mother's disappearance. The letter claims that her mother is still alive, and that both she and her mother are now in grave danger. Joy doesn't believe it, until her home island is attacked by an ancient creature that kidnaps her childhood friend while it flees. Joy realizes that she has no choice but to follow the beast, along with the letter's cryptic instructions. With the help of a reluctant band of bounty hunters and an unlikely Eldritch mentor, Joy sets off in search of the fabled Silver Key and The Cosmic Slayers - a secretive group of people who dared to fight the all-powerful Elder Gods themselves - and survived. But her journey is interrupted as a cultist with immense power named Yellow King begins to hunt her down. If Joy and her allies can't retrieve the Silver Key while evading Yellow King's assassins, she will never know the truth behind her secretive family, and worse; the Elder Gods will be freed to roam the Cosmos once again.