"Gu Family Book" Lee Seung Gi finally realizes who Bae Suzy is.

May 7, the 10th episode of the MBC drama "Gu Family Book" featured Choi Kang Chi (Lee Seung Gi) getting locked inside of a secret safe with Dam Yeo Wool (Bae Suzy).

In order to escape Jo Kwan Woong's (Lee Sung Jae) men that are chasing them, Choi Kang Chi and Dam Yeo Wool hide inside of a secret safe. Choi Kang Chi realizes that Dam Yeo Wool is losing consciousness from getting injured. In the process, Choi Kang Chi discovers that Dam Yeo Wool is a woman and then realizes that he is the one who injured her.

Choi Kang Chi says, "We need to get out of here first. It will be really bad if you get tetanus." However, Dam Yeo Wool stops him and tells him that she will never be able to live with herself if something bad happens to the naval forces.

Right before Dam Yeo Wool loses consciousness completely, she says, "My name is Dam Yeo Wool, stupid." Right then, Choi Kang Chi remembers the time when he saved Dam Yeo Wool from a wild dog when they were little as well as how they used to like each other.