Woo Chae Woon, a former Navy officer, aims to uncover the truth behind a bombing incident during his tenure as a captain a year ago. Lee Mun Gyu, a former president, suspects Yun Ja Yu of being linked to the bombing. Leveraging information from Lee Mun Gyu, Woo Chae Woon swiftly infiltrates BF by becoming the personal bodyguard of BF CEO, Yun Ja Yu.
He employs various tactics to dispel Yun Ja Yu’s suspicions, who harbors hidden agendas. Among them, Woo Chae Woon is proactive in assisting Yun Ja Yu with anything she requires, including the arduous task of locating the escaped BF program hacker. The following are compelling indicators of Yun Ja Yu’s trust in Woo Chae Woon in Blood Free.
1. Suspecting Woo Chae Woon’s involvement amidst the turmoil, Yun Ja Yu becomes content and ceases to reject Woo Chae Woon’s explanations.
2. Yun Ja Yu grants Woo Chae Woon official access to the BF building, akin to other BF employees.
3. Yun Ja Yu is impressed by Woo Chae Woon’s clever and swift methods in aiding her hunt for the BF program hacker.
4. Upon learning of Woo Chae Woon’s sacrifices, sustaining injuries, and utilizing personal funds to track down the hacker, Yun Ja Yu feels compassion towards him.
5. Yun Ja Yu consistently trusts every word and heeds Woo Chae Woon’s counsel whenever confronted with challenges.
6. Despite facing protests preventing her from residing in her own home, Yun Ja Yu is comfortable staying at Woo Chae Woon’s residence.
7. Expressing remorse and concern for suspecting Woo Chae Woon as a spy for the former president, Yun Ja Yu indirectly conveys her regret, which satisfies Woo Chae Woon regarding his devised strategy.
With Yun Ja Yu’s trust in Woo Chae Woon established in Blood Free, Woo Chae Woon gains easy access to the BF building, facilitating his quest to unearth the truth regarding Yun Ja Yu’s involvement in the bombing. What follows is Woo Chae Woon’s investigation of Yun Ja Yu for the bombing incident a year prior in the drama Blood Free.