Shy, soft-spoken Joel Barish and unrestrained free spirit Clementine Kruczynski begin a relationship on a Long Island Rail Road train from Montauk to Rockville Centre. Joel and Clementine almost immediately connect, feeling drawn to each other despite their contrasting personalities, and both had felt the need to travel to Montauk that day. Although they do not realize it, they are former lovers, now separated after having dated for two years. After a fight, Clementine had hired the New York City firm Lacuna, Inc. to erase all of her memories of their relationship. Upon discovering this from his friends Rob and Carrie, Joel had been saddened and decided to undergo the procedure himself, a process that took place while he slept.