The residential elevator suddenly breaks down, but homeowners' representative Lin Lan refuses to sign the 180 thousand repair bill, instantly becoming the target of accusations from the whole building. Facing elevator shutdowns, gate duty suspensions, and misunderstandings from neighbors, she insists on auditing the accounts, gradually discovering that the real repair quote is only 48 thousand, and three years of 720 thousand in advertising revenue have also vanished into mystery. As the five-day deadline approaches, can she use evidence to restore the facts, get the elevator running again, and make every single piece of public revenue open and transparent?