Korean drama co-written and directed by Chang-dong Lee. While out on a delivery, courier and aspiring writer Lee Jong-su Ah-In Yoo meets Shin Hae-mi Jong-seon Jeon, who claims they were childhood friends. Despite not recognising her, Jong-su joins Hae-mi for dinner and agrees to watch her cat while she's away on an upcoming trip to Africa. However, he is shocked when she returns with rich Korean Ben Steven Yeun. As Jong-su gets to know him, Ben reveals an unusual clandestine compulsion, a revelation that leads Jong-su to develop a consuming obsession with Hae-mi's enigmatic new boyfriend.