Young girl Yun Jin takes over the Qianji Sect, which is on the verge of bankruptcy, a sect with only a ruined temple and bad accounts left. Only a ruined temple and bad accounts left. Relying on her accounting skills, she breaks the deadlock and turns the tables, yet gets embroiled in an old case from thirty years ago where the sect was framed and its name destroyed, seals the shop, in the open chamber of commerce nobles test her one after another, in the dark a lamp-guard old abacus accompanies and guides her. She sets a trap to defeat the enemy, gambles heavily to turn the tables, and re-establishes the Qianji Sect. All the old accounts are turned over, that fingerprint belongs to the great-grandfather, and also belongs to the mother; Yun Arou on the name card is the road home for her.