Lee Israel was a real person. She was a freelance writer who landed an interview with Katherine Hepburn in 1967 and spun from that into a career as a biographer. Sic transit gloria, though. Her books stopped selling, and in 1992 she embarked on another career as a forger of literary letters. Whether bold enough or desperate enough, she also stole letters from archives, hoping to substitute her own copies while selling the originals. A cunning and original plan, but not one she could carry off very long, as she was arrested and pleaded guilty to conspiracy to transport stolen property in 1993.
Can You Ever Forgive Me? is a film based on Israel's autobiography. It's a kind of caper movie, where the tools of the heist are typewriters and Israel's oven, which she uses to artificially age her forged documents. A caper with no physical violence and very little action. Really, though, it's a depiction of loneliness, desperation, self-destructiveness. As portrayed by Melissa McCarthy, Israel is a solitary alcoholic with a secondary addiction of burning bridges. Her forgery scheme is a necessary confidence booster as well as a moneymaker, but she can't completely suppress the suspicion she might be doing something wrong.
It's far from unrelieved misery, though. McCarthy is best known for comedy, and she's frequently funny here. So is Richard E. Grant as her petty criminal best friend, although his story turns tragic as well. Also among the movie's pleasures are a jazz-inflected score and a lived-in New York atmosphere, pre-gentrification.
If you're a cat lover, prepare for some sadness, though.