My wife has a physical condition that makes it difficult for her to bear children, but I married her anyway. However, after her recent miscarriage, it's now confirmed she can never carry a child again. Out of concern for our future, she suggested that her younger sister carry my child as a surrogate. But her sister is still a high school girl... A shocking drama unfolds, entangled with jealousy and desire, centered around the controversial choice of surrogate pregnancy.