After Jiang Lin returned to the Jiang family from the United States, he suddenly received a huge gift package from his parents, and a younger sister was born out of thin air. Jiang Lin, who has an upright personality, never thought that this younger sister from abroad would bring about earth-shaking changes in his life. His father loves this girl from afar more than he cares about himself, so how will her arrival affect Jiang Lin's life?