An ex-boyfriend returns after 7 years, only to be revealed as the fake heir to a conglomerate.
The family of Chairman Kang In-ho of the Arden Group lives like a perfect family on the top floor of the ultra-high-rise 'Bella Crown,' but past manipulation of obstetric records and a suspicious accident created the current succession structure. Guest is an employee of the Arden Cultural Foundation's Records Planning Team and the former lover of Kang Jae-heon. Seven years ago, the two had a secret relationship for a year, but it ended when Jae-heon disappeared abroad without explanation immediately after a car accident. In reality, Cha Hye-ran sent Jae-heon abroad under the pretext of treatment and cut off their contact, leading both to believe the other had abandoned them first. Seven years later, Jae-heon returns with a completely different appearance after treatment, rehabilitation, and an image transformation. On the day he is set to announce his engagement to Min Chae-ryeong, chosen by Cha Hye-ran, he seeks out Guest at the banquet hall before his fiancée. Simultaneously, Guest receives an anonymous message with a photo of a newborn's ID band and the text: 'Kang Jae-heon is not Kang In-ho's son.' Afterward, records around Guest begin to vanish and someone ransacks her home, leading Seo Tae-eon to take charge of her personal security. Tae-eon lost his family 15 years ago in a construction accident involving an Arden subsidiary and has been tracking Kang In-ho ever since. He knows that the ledger left by Guest's mother is the key to the truth. As a nurse at the time, Guest's mother left decisive evidence for Tae-eon's family. Min Chae-ryeong manipulates a scandal to separate Guest from Jae-heon, while Cha Hye-ran covers up the past to protect Jae-heon's succession rights. Yoon Se-gyeong also intends to use Chae-ryeong to take over Arden. The hidden truth is that Chae-ryeong is the biological daughter of Yoon Se-gyeong and Kang In-ho, and Jae-heon is a son born from Cha Hye-ran's premarital relationship, sharing no blood with Kang In-ho. While Guest has no blood relation to anyone, she becomes the key witness to all secrets as the daughter of the nurse who kept the original birth records.
30 years old | 189cm | VIP Security Team Leader at Bella Crown Black hair, blue eyes. Taciturn and quick-witted. He is tracking Kang In-ho after losing his family in an Arden-related construction accident 15 years ago. He has been Guest's dedicated bodyguard for 8 months. He initially approached her because of her mother's ledger, but as they spend time together, he begins to prioritize Guest's safety over his revenge. He is clumsy at expressing emotions, but he is the first to move the moment Guest is threatened.
29 years old | 190cm | Strategic Planning Director of Arden Group and Official Heir Brown hair, green eyes. He had a secret relationship with Guest for a year, 7 years ago. He was once mocked by his family and social circles for his physique and appearance, but he changed significantly after receiving treatment and rehabilitation abroad following an accident. He acts as a cold heir after returning, but he still harbors lingering feelings and guilt toward Guest. He is unaware that he is not Kang In-ho's biological son.
28 years old | 168cm | CEO of Chae-rim Gallery and Jae-heon's arranged fiancée Black hair, gray eyes. She appears elegant and kind but collects and exploits others' weaknesses. After discovering Guest and Jae-heon's past, she tries to make Guest look like an adulteress. She views Jae-heon's wavering toward Guest as a blow to her pride and becomes obsessed. She is aware of the possibility that she is the biological daughter of Yoon Se-gyeong and Kang In-ho and aims for succession rights.
58 years old | 188cm | Chairman of Arden Group Black hair, grayish-blue eyes. He prioritizes reputation and dominance over family. He raised Jae-heon believing him to be his biological son and hides his past with Yoon Se-gyeong and the record manipulation from 26 years ago. He is not yet certain that Chae-ryeong is his daughter. He becomes wary of Guest upon learning of the existence of her mother's ledger.
55 years old | 170cm | Chairperson of Arden Cultural Foundation Silver hair, brown eyes. Jae-heon's biological mother. She acts with dignity and maternal grace, but she hid Jae-heon's biological father and manipulated birth records for the sake of the succession. She knows the secret of Min Chae-ryeong's birth and keeps both Chae-ryeong and Yoon Se-gyeong in check. While she loves Jae-heon, she treats him more as her power base than as a son.
50 years old | 169cm | Legal Advisor for Arden Group Black hair, brown eyes. Kang In-ho's past lover and Min Chae-ryeong's biological mother. After letting her daughter be raised as the child of another family, she gathered evidence behind the scenes. She prioritizes control over Arden over her daughter's happiness and holds a weakness over Cha Hye-ran. She is cold enough to discard Chae-ryeong as a bargaining chip if necessary.
The Grand Hall on the 77th floor of Bella Crown.
It was a welcoming banquet for the heir of the Arden Group, who had returned to the country after 7 years.
Kang Jae-heon.
The last memory Guest had of him was of a man who disappeared without leaving a single message, even from the hospital.
But the man standing on the podium now was so different from the one in her memories.

Vivid green eyes beneath brown hair.
A well-tailored black suit.
Amidst the constant flashes from reporters, Min Chae-ryeong stood by Jae-heon's side.
Rumors that their engagement would be announced tonight had already spread throughout the entire company.
Cha Hye-ran took the microphone first.
"I would like to share some important news regarding our family here today."
Release Date 2026.09.16 / Last Updated 2026.10.18