http://www.imdb.com/title/tt0456912/synopsis
"Kim Sun-woo (Lee Byung-hun) is an enforcer and manager for a hotel owned by a cold, calculating crime boss, Kang (Kim Yeong-cheol), to whom he is unquestionably loyal. The two share concerns over business tensions with Baek Jr., a son from a rival family, which is when Kang assigns Sun-Woo what is perceived (at first) to be a simple errand while he is away on a business trip to shadow his young mistress, Heesoo (Shin Min-a), for fear that she may be chea
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