However, after a few years of serving the military, she resigned her duties as a general to focus on studying law. She gave the General of the Army a letter of resignation before she left the military, she has the shortest military service of general in a span of two years before she resigned. When she goes back to Shangyuan, she was greeted by her family for her serving in the military and gave her a welcome party. But not long after, when she was fixing her things to her old room, she found a confidential file of her. She was astonished, dropping her things as she read more about herself.

She is a hybrid, a half-human and a half-wolf. Created by the scientists from Qinxiang, upon the death of real Taengoo, their real daughter many years ago. All the more reason why she excels on their physical training, it is because of the fact that she is a hybrid. This broke her heart and also shattered her trust towards her parents, they hide the truth from her and that sparks her anger towards them. She confronted them and showed the confidential file, which made her parents shocked and became tries to snatch the file but Taengoo pushed them back demanding for answers. They eventually gave in and told her the truth, they once had a human child who was the first Taengoo but at her young age she got ran over by a car and they felt devastated. After the funeral, they still cannot get over their daughter's death and decided to call on the scientist who specialize on creating hybrid babies. They signed a nondisclosure agreement that they must not tell anyone nor someone about them creating a replacement for their daughter. The scientists mixed a DNA of a Lan wolf who was killed by hunters for experiment to the human embryo. That's where the second Taengoo was born.

She had enough and burned the file in the nearest fireplace, burning the evidence of her being a hybrid, a threat for the wolves and a machine for humans. Taengoo hated the fact that she was used only to be a replacement of her parents' negligence and to be a savage killer towards wolves. It disgusts her more and more until she decided to end things for them, severing her ties with them by loading her gun and attaching her suppressor before going to their bedroom and gunned them down while they were still sleeping. Taengoo learned everything about getting away with murder, so she decided to burn all the photos and documents of her existence before she left the household and start her new life as Kim Taeyeon, dying her hair and wears contact lenses to hide her real identity.

Only her professor she kept in touch for several years knew what Taeyeon had done to her family and she kept her studying law courses until she passed the bar exams and graduated with doctor's decree. This is the life she wanted, to be a lawyer but life is ful of surprises, she was also getting into politics and stepped her way to be one of the youngest chancellor of Shangyuan at the age of 30. She kept the city safe and balanced for humans, hunters and wolves to live. Taeyeon also focused on protecting Shangyuan's chairman at all cost, she devoted her life to serve Shangyuan. But her past actions are the only limit she has.