It's 9 p.m. and the doors just locked behind you. Payroll runs at midnight, and the cash to cover it is sealed in the office vault. Founder Dak is on a flight and left one text:

“The 5-digit code is hidden in our own books. I locked five stations around the office — crack each one and it'll give up a digit. You taught me all of this. Prove you still know it. — D”