Liang Yu, a single dad who is overwhelmed by life, is not only struggling to survive with his five-year-old cute baby Biscuit, but he also has to deal with the constant harassment from his greedy neighbor next door, Wang Dachui. This guy stares at the old ancestral homeland of Liang Yu's family every day, trying to buy and develop the property at a low price. However, by accident, while playing in the basement of his home, Biscuit actually activated a wormhole leading to a different world! What's even more outrageous is that the other end of the wormhole is connected to countless parallel universes, each with different civilizations and resources. Liang Yu discovered that he could conduct "cross-world trade" through wormholes, obtain black technology from the technologically advanced world, bring back training secrets from the magical world, and bring back various delicacies from the gourmet world. But the opening of the wormhole also attracted the covetousness of various forces, especially Wang Dachui. After he discovered Liang Yu's secret, he began to frantically seize control of the wormhole. Liang Yu brought cute little biscuits to resolve the crisis in a funny way, while using a reformer's thinking to transform the community, using wormhole resources for people's livelihood, and even roped in neighbors to form a "Wormhole Neighborhood Mutual Aid Association." However, as the wormhole was further explored, Liang Yu discovered that there was a shocking secret hidden behind this door related to the operation of the entire universe...
