[This section is in Walker's POV]
Hunter had originally thought that the reason his father had returned this early on a Saturday afternoon was because he took some time off. However, the reality was actually much more complicated than that. It was actually Walker who let him off the hook early that day. This was actually Hunter's fault in an indirect manner.
Walker walked from his office at towards the elevator. Then, he took the lift to the top floor. People might have thought that the buttons located next to the elevator represents all the floors that this elevator could travel towards. It will surprise most employees of this building to find that they were wrong.