Kang Soo Hyuk, a 25-year-old CEO, protects his younger brother, Kang Min, a cheerful but competitive teenager. Their mother, Kang Min Soo, worries about the family's unresolved grudges. They live in a home full of memories, supported by close friends Lee Jong, Sung Jae, and Kim Hanna, as they navigate their past and face new challenges together.