Mike and Erin are pharmacists working in a lab. They have been friends for a long time. Mike has never been in love, but Erin is quite a love 'expert'. After watching a movie together, Mike finds out that the actress in the movie lives in the same apartment with him. One day Mike finds out a science report that has discovered there is a hair-like structure growing on a person's heart when he/she is in love. After he realizes that his heart is pumping so fast whenever he sees the actress and having a long counseling with Erin. He decides to check his heart.