The Thorn Birds is about two women who go to extreme measures to fulfill their desires. Seo Jung-Eun (Han Hye-Jin) works as a small-time extras actress, but dreams of becoming a star someday. She grew up in a orphanage and hopes to find her real mom if she becomes a star. Lee Young-Jo (Joo Sang-Wook) is from a chaebol family, but he starts his own business. Jung-Eun and Han Yu-Kyung (Kim Min-Jung) both love him. Choi Kang-Woo (Seo Do-Yeong) is a movie director who loves Jung-Eun.