Wang Can, a 25-year-old nibbling old man, accidentally traveled through time and became a 7-year-old street beggar Wang Erdan in Beijing in 1955. He activated the "begging return system" when he was freezing and hungry. In order to survive in a strange era, he started out as a novice beggar who was dumb and forgetful of words. He took root in a courtyard and formed warm bonds with neighbors such as kind uncles and enthusiastic aunts. He also met friends such as the fat man Li Tiezhu. There are constant jokes about the system. He has experienced hilarious embarrassments such as mistaking stones for begging items, having his bowl broken by a stray dog, and overturning his car after using his stealth card. He has also encountered troubles such as being stoned by children and being coveted by scammers. As the system was upgraded, functions such as returning critical hits, material storage, and skill packs were unlocked. From begging for food and change, he gradually begged for cloth tickets and cultural relic fragments. From an old man who ate and waited to die, he gradually became sensible and diligent. He not only improved his own life, but also silently used the materials returned by the system to give back to his neighbors and protect the courtyard. He made his way through the capital in a funny way, growing up amidst laughter and scolding. Finally, relying on the system and his own efforts, he lived a different happy life in 1955.