Doomsday descends, Su Chengcheng awakens the "most useless" live streaming sales system, and Su Zhenjie possesses the flash delivery superpower, capable of precise delivery. Father and daughter join forces to live-stream selling supplies amidst the zombie siege, rapidly skyrocketing in popularity, yet they are hunted by bases such as Meng, Fangzhou, and Panshi due to selling at low prices. Su Chengcheng refuses monopoly, counterattacking under the protection of Panda Base leader Gu Ningyan and officials, ultimately changing the doomsday with supplies and allowing survivors to regain food, clothing, and order. She was once abandoned by her mother Li Yueru, and then weathered crises together with her father, transforming from a despised useless superpower user into the hope of the doomsday.