Watch Guarded Heart, Hidden Flame Episode 4 Online for Free

New security guard Lin Shuang joins Su Group just as President Su Wanqiao and her sister are being welcomed by the security team. Su Wanqiao notices Lin Shuang's peculiar attention and her expression subtly changes. At this moment, Su Wanqiao's fiancé, Bai Jingze, arrives uninvited and publicly threatens Su Wanqiao with the influence of the Du family in Shanghai and their covetousness for "Tian Yao," forcing her to marry him in exchange for the Su family's protection. A conflict is on the verge of erupting between the two sisters and Bai Jingze.