How about me? As a “dog” to keep by your side.” “Seyeon Seong” grew up as the beloved second son of the most influential corporation in the country, only to lose his parents in a sudden fire. With his older brother out of commission, the only available guardian is “Soohyuk Kim”, the vice-president whose ambition is to swallow the corporation whole. To protect the only family he has left, he suffers years under the guardianship of Soohyuk as his puppet. However, on the day of his twentieth birthday, he receives a mysterious letter that promises to help him get free. The sender turns out to be “Hyun Lee,” a mysterious man who claims to have been sent by his father. Can he trust this man, with whose arrival the secrets of his parents’ death slowly unveil?