WHEN JOEL DISCOVERS THAT HIS GIRLFRIEND CLEMENTINE HAS HAD THEIR TUMULTUOUS RELATIONSHIP ERASED FROM HER MIND THROUGH AN EXPERIMENTAL SCIENTIFIC PROCEDURE, HE DECIDES TO ERASE HIS OWN PAIN BY GETTING THE SAME TREATMENT. BUT AS EACH MEMORY IS ELIMINATED, JOEL SUDDENLY REALIZES HOW MUCH HE STILL LOVES HER.