In the house of three, there is a young couple living with a father in his fifties. Although he is old, the father still shows his robust health. The son works from morning till evening while the dutiful daughter-in-law takes care of the household. Others might think that this family is living very happily, but that's not true. The husband unfortunately suffers from erectile dysfunction, making it difficult for them to have children, while the wife always longs for a baby to bring joy to the home. This complicated situation causes her not to be able to fully commit her heart to her husband, and instead, she finds herself having an affair with her father-in-law to seek hope and an alternative path to achieve her long-desired goal. But what will happen tomorrow when the husband discovers that this child is not his, but his father's?