
In the biblical sense, this drama's foundation is based upon the story of Cain and Abel. Cain was a farmer while Abel was a shepherd, and in short, rooted in jealousy, Cain ends up killing his brother Abel...
In this drama, Lee Cho-In (So Ji-Sup) most resembles Abel in that he is sincere, loved by his father, and is a successful doctor. His older brother, Lee Sun-Woo (Shin Hyun-Joon), will take the characteristics of a jealous Cain. It is through this relationship where the jealousy of love, acknowledgment, and even one another's love for a woman that sparks this drama.
A hospital owner is killed in a car accident and his pregnant wife falls into a coma. His partner and friend adopts the baby who is raised in an incubator. The baby grows up with the son of his foster parents, who are now the sole owners of the hospital. The two brothers grow up to become prominent neurosurgeons.
Despite the brotherly affection between the two boys whilst growing up, Seon-u's affection for his younger brother turns into bitter jealousy when he realizes his father's desire to hand over the management of the hospital to his adopted younger brother, Cho-in. This jealousy runs out of control when he realizes that Cho-in has also stolen the heart of his love, Seo-yeon. Seon-u plans the murder of his younger brother and pays a killer to do the job. Miraculously surviving the attempted murder, Cho-in plans on his own revenge.
Cast
Lee Cho-in Performed by So Ji Sub
Lee Cho-in Performed by So Ji SubCho-in is born while his mother is still in a coma after a fatal car accident. Adopted by a friend of his father, Cho-in grows fond of his older brother Seon-u and the two boys grow up together like good brothers. Seon-u was a role model for Cho-in who followed the footsteps of his older brother to become a doctor. A series of events turns the brotherly affection into fatal jealousy, and Cho-in survives an attempted murder ordered by his older brother. Compared to the overambitious Seon-u, Cho-in is a more warm-hearted character who dreams of finding genuine love.
Lee Seon-u Performed by Shin Hyun Jun
Lee Seon-u Performed by Shin Hyun Jun Seon-u welcomes the younger brother Cho-in into the family as he greets baby Cho-in in the incubator. Witnessing that this gesture has won him a warm smile of his usually cold father, Seon-u decides to become a good older brother for Cho-in. Time goes by and Seon-u leaves to study in the US to become a prominent neurosurgeon. With 3,000 successful records of neurosurgery, he gains a strong reputation in a famous general hospital in the US. However, he turns into a heartless and ruthless character when he realizes that his father has handed over the hospital management to his younger brother and that the only love in his life, Seo-yeon, has opened her heart to Cho-in.
Oh Yeong-ji Performed by Han Ji Min
Oh Yeong-ji Performed by Han Ji Min Yeong-ji's father who is a film director was one of the people sent to North Korea during their residence in Japan. Things get worse as the family is kicked out of their home empty handed due to a political conspiracy. The family decides to escape from North Korea. Yeong-ji is the first to escape and settles in China as a tour guide, waiting for the rest of her family and that is where she meets Cho-in.
Kim Seo-yeon Performed by Chae Jung Ahn
Kim Seo-yeon (interpretada por Chae Jung-an) Born with a heart deformation, hospitals are the last place that Seo-yeon wants to be. However, her fear of hospitals fade away when Seon-u and Cho-in come into her life. She falls in love with Seon-u as a teenager, but he is never there for her when she needs him. It was always Cho-in who comforted her in Seon-u's absence. Seo-yeon waits for Seon-u's return from the US, but she is let down again. He returns after 7 years and Seo-yeon is at first determined to pay him back for her broken heart, only to realize how much she loves him.

