Yinchen and Yinxi are a pair of very close sisters. Yinxi is the boss of SHERO, an all-female bodyguard company she set up after their parents were murdered 7 years ago. While protecting a famous Korean soccer player Kim, Yinxi and team faces off with a mafia gang in their riskiest assignment to date...

Yinxi escorts socialite Gina to Australia for an auction, Yinchen tags along. Gina sells her necklace at a high price to Mr and Mrs Yue Feihong. Right before the assignment ends, Yinxi gets into a conflict with Gina. The two sisters plan to meet after the mission, but Yinxi fails to show up; unbeknownst to Yinchen, Yinxi is being pursued by a mysterious killer...

Unable to find Yinxi, Yinchen makes a police report. Ruixiang notices that someone is tailing him and injures himself accidentally. At the hospital, Ruixiang runs into Yinchen, who is still trying to look for Yinxi. Ruixiang offers to help put up a search notice. Police investigations show that Yinxi is likely dead, leaving Yin Xi devastated...

A devastated Yinchen returns to Singapore, Junsheng consoles her. With Yinxi gone, Yinchen considers closing down SHERO, leaving the team heavy-hearted. Junsheng is the finance manager at RSB and also Ruixiang's good friend, but he has yet another identity. After watching Yinxi's interview about SHERO, Yinchen decides to take over the company to continue her sister's legacy...

Yinchen starts undergoing various training to become an excellent bodyguard like Yinxi. As part of her training, Yinchen is assigned to a new case together with Jingyu. Dai Guowei hires Xinya and Meizhen, but his inappropriate behavior triggers painful memories for Xinya. Ruixiang is attacked by an assassin, and Junsheng intervenes just in time to save him...