She is an auditor and numbers are her only truth. He is the president of the group, and interests are his eternal criterion. An audit full of doubts forcibly binds people from two worlds - he needs her to pretend to be his girlfriend to resist family marriage; she needs him to open up his authority and thoroughly investigate old accounts. A contract, everyone gets what they need. But she didn't expect that the audit would reveal the fire that burned down her father's factory fifteen years ago, and all the clues pointed to the family abyss behind him. When rational principles begin to give way to heartbeats, how should we audit the sincerity of a relationship that began with calculation?