have a score to settle
To have an old problem, grudge, or grievance (with or against someone or something) that one wishes or intends to redress or rectify. I have a score to settle with that no-good swindler who cheated me out of my inheritance. The former champion entered the competition having a score to settle, after being knocked out of the tournament last year by a newcomer.
have a score to settle (with someone)
Fig. to have a problem to clear up with someone; to have to get even with someone about something. I have a score to settle with John since he insulted me at our party. John and I have a score to settle.