The little Nian Beast, Xiao Nian, accidentally falls into the mortal world. To accumulate merits and return to Heaven, he helps Suisui's family, a farming family who took him in, ward off evil, uphold righteousness, attract blessings and good fortune, and protect their home. Not only does he make everything go smoothly for his own family, but through a series of events, including helping a lucky koi transform into a dragon and resolving disputes among villagers, he also spreads good fortune throughout the village. Meanwhile, the hidden royal identity of Suisui's family gradually comes to light. With Xiao Nian's help, they eventually reunite with the emperor, who has traveled incognito in search of his relatives, fulfilling their wish to reunite as a family and reclaim their royal ancestry. Finally, after completing his trials in the mortal world, the Nian Beast transforms into a golden light and returns to Heaven.