It is rumored that Xiao Yan, the Prince of the Northern Frontier, is cold-hearted and merciless, a living King of Hell whose wives are doomed to die. On his wedding day, he shuts the gates tight, ready to sit back and enjoy the spectacle. But Shen Yun, the abandoned daughter of a marquis's household who has been sent as a substitute bride, not only lifts her own bridal veil but secretly slips a poisoned needle into her scheming cousin's sachet. Everyone expects the cold-faced prince to fly into a rage, but instead, he takes off his cloak, revealing his wedding robes, and immediately teams up with his new princess consort to turn the tables and extort a hundred thousand taels of gold from the emperor. After their wedding, the so-called King of Hell reveals his true nature: he is always the first to lead a household raid and never lets go of his golden abacus. When the imperial treasury runs out of grain, his princess consort personally heads south to Jiangnan to raise funds. When the emperor picks a fight, the husband and wife join forces to outwit him. Watch as this money-loving couple plunders the imperial treasury and seizes power at court.