Shen Yanyan, the mortal realm's top fraudulent merchant and charlatan, faked her death to extort five hundred taels in a staged collision, only to fall right into the coffin of the newly awakened world-destroying demon lord. To save her life, she hoodwinked the amnesiac demon lord into signing an indenture with a monthly salary of three copper coins, including room and board. Relying on 'subduing demons and eliminating devils,' the two make a fortune and bring laughter with endless hilarious mishaps. Yet every single copper coin she earns is accumulating merit for him, suppressing his world-destroying demonic nature. Ten thousand years ago, she shattered her divine status for him; will this lifetime's fate replay, or will she defy the heavens and change her destiny?