(I had to re-upload this two times, because I had the characters call Paul "Justin" and didn't realize it until now, since I started working on this a few days ago.)
In this episode, Grace would cross path with an ex-friend, whom she initially had a good relationship with. But as time went on, their relationship soured after Grace was mad at him over something petty. Paul decided to get back at her, unlawfully, by faking his own death and getting her arrested and thrown in jail, but that in turn did barely anything, since she would eventually escape jail because the security sucked.
Since then, their relationship soured even harder than ever. Fast forward almost 5 years later, things may have...changed.