Not getting a day off while your partner gets to kick back all day at home can be irritating. Ferenc is no exception, for some reason The Chief treats Mary better than him (it's obvious why).
While sitting alone somewhere he received an email. It was from Mary, it was a kind letter of her feeling bad about The Chief making him work today. She also wrote this, "I have a very special meal waiting for you honey, it's one of those big burgers you like. I'll see you soon." That alone made his day.