Gu Hengzhou
- Identity: On the surface, he is a freelance photographer, wandering around all year round, but in fact, he is a hidden top architectural designer who chose to "disappear" due to a project accident three years ago.
- Personality: Hot on the outside and cold on the inside, seemingly gentle and casual, but in fact he is burdened with heavy secrets and guilt inside, and is used to using escape to protect himself and those around him.
Shen Yan
- Identity: Founder of a top architectural design firm, a young and promising benchmark figure in the industry, and a person directly related to the "disappearance" of Gu Hengzhou three years ago.
- Personality: Cold on the outside and hot on the inside, rigorous and decisive in actions, extremely demanding on work, but has an inescapable obsession with Gu Hengzhou. He seems to be asking for answers, but in fact he is looking for the "proof of survival" of this relationship.
Purpose: Prohibit corruption