The story follows a man and a woman who are trapped in a time loop, reliving the same day over and over. As they work together to escape the loop, they discover that they have the power to manipulate time itself. They soon learn that they are part of a larger game controlled by powerful entities known as the "Game Masters." The man and the woman must navigate the complexities of time travel, alternate realities, and cosmic threats. Along the way, they become guardians of the cosmos, tasked with protecting the multiverse from rogue entities like the Devourer and the Unmaker. Through their journey, they discover their true purpose and ultimately merge with the universe, becoming one with the cosmos.