The mother sells fish for a living and supports her two sons. However, because of the scars on her arms, she is considered as having an infectious disease and lives a difficult life. Because the younger son has allergies since childhood and gets more care from his mother, the older son is jealous. During a quarrel with his younger brother, he accidentally causes his younger brother to fall down the mountain and disappear.
The mother always thinks that her younger son is not dead. She searchs for her son for years. Eighteen years later, the younger son who is rescued and becomes the heir of a big Group. He always wants to find his mother. However, due to the demolition of the old house, the lost son misses the opportunity to find his mother. But the eldest son abandons his mother and refuses to recognize her because he wants to marry a rich family.
In the process of searching for her son, she experiences various humiliations and grievances, can she finally recognize him?"
