Han Tae-Woong is a financially unstable high school student trying to support his single mother. His dream is to become a bodyguard after he graduates. He is destined to cross paths with Kim Gavin, the granddaughter of Korea's richest chairman. Since she is stuck in a trashy high school, she gets continuously bullied. Thus, Tae-Woong is hired by her grandmother's company to protect her. The issue lies in her HATING when others invade her privacy. Will Tae-Woong’s attempts to break through her antipathic personality ever succeed?