In Once Upon A Breakup movie, after being abandoned on her birthday by her college boyfriend, Mia impulsively proposes to Carson, the charming but dangerous leader of the Moretti crime family. Though their relationship begins as a rash escape, it quickly turns into something real. But Mia’s ex refuses to let go. Obsessed, jealous, and spiraling out of control, he’ll stop at nothing to win her back, even if it means destroying the new life Mia’s trying to build with Carson. However, Mia isn’t looking back. She's thriving with Carson by her side and ready to show Aiden exactly what he threw away.
