Lin Guang arrives in a beast-taming world as a transmigrator, only to discover that his exceptional talent paradoxically prevents him from binding a beast. Locked out of his system without a contracted companion, he ventures into the shadowy black market seeking an unconventional solution. What he finds there shatters his expectations—his first beast is no ordinary creature, but a girl from an alternate dimension. Bound by an Equal Contract that forbids them from causing each other harm, Lin Guang must navigate an unexpected partnership where his new companion desperately seeks redemption. As their fate intertwines through the binding agreement, questions emerge about trust, second chances, and whether this peculiar bond can overcome the circumstances that brought them together.