24-year-old office worker Lin Mo is harassed in various ways by supervisor Zhang Li, but unexpectedly learns she is the Lin Group's sole heir. The inheritance test is to go under an alias and work at her own family's branch company for 3 months, securing three core projects; if her identity is leaked, the inheritance becomes void. President's special assistant Su Yan disguises himself as administrative staff to escort her in secret. Holding a black card while pretending to be poor, she slaps workplace villains in fancy ways while growing mutual affection side by side with Su Yan. Finally, her identity is exposed, villains are crushed, and she reaps a double harvest of career and love.