Her parents Valinn and Fred Denig used to run a family jewelry business.
The former revealed the haters were online trolls.
He invites her to a party at his house, where to her surprise she learns that despite slumming it as a musician he is quite wealthy.
At the same time, Grace realizes that she misses Maggie who was a faithful assistant who never used her.
He asks Grace to join him on stage, revealing she is his mother, and they sing a duet as Maggie watches.
In February 2020 the film was re-titled The High Note.