About a Mentor who in giving the sum of his life's knowledge and experience to an ungrateful protege, who in turn betrays him.
The Mentor then proceeds to run into him at a concert, forgives and gives him a second chance, which the protege takes to upstage him and steal the show.
I liked it, but anyone who argues "The Mentor" was abusive hasn't had the jobs I've had.
Liked it enough to watch her other movie, "La La Land", which was again - pretty damn good, the Bollywood styled song-and-dance married well with the subject, sort of this centuries "Moulin Rouge". Except a lot better written.
They're both fresh enough that if you want to see either you can search them out yourself and find them...