From NetFlix:

A middle-aged professor at a small Rhode Island college edges close to his breaking point, until he finds renewed purpose in his life after embarking on an unusual relationship with one of his students.

When Joaquin Phoenix is in a film, I will at least start to watch the film. For awhile his character Abe spends a fair amount of time whining about his despairing life even after meeting his student Jill, played by Emma Stone. Indeed the “talking heads” do ramble on about philosophic theories until one day in a restaurant — oops!, no spoilers allowed. “Irrational Man” is somewhat ordinary but good enough that I had to see what happens next, especially after that day in the restaurant — oops!

Eventually you will see that the film is well named. Meantime keep the faith.