After unsuccessfully trying to have a baby of their own, Dr. Kim Do Il and his father convince his wife Choi Mi Sook to adopt a child in an orphanage. Mi Sook is connected to arts and chooses the six years Kim Jin Sung that loves to draw trees. The boy becomes close to the eight years old next door neighbour Min Jee and is attracted to an old Acacia tree in their lawn. When Mi Sook unexpectedly gets pregnant, her mother asks her to return Jin Sung to the orphanage, beginning the rejection process of the boy. When the baby is born, Mi Sook does not treat Jin Sung well, who believes the acacia tree is his mother, and on a rainy night, he vanishes. Along the next days, the family becomes insane, disclosing a dark secret about Jin Sung. Written by Claudio Carvalho