Of course, Eleanor Oliphant is not completely fine, at least not at the beginning of the book. Eleanor is weird and quirky, socially inept and isolated, spending her weeks in a job at which she is competent but not liked, and her weekends with vodka and pizza.
When Eleanor and an IT guy from her office, Raymond, help to save a stranger who collapses on the sidewalk, things start to change. Eleanor begins to confront her past and the events which left her deeply damaged. Charming and life affirming.