Lena, a member of a special unit, investigates a dangerous case while facing personal struggles—she is forgetful and worried, and her partner, Miu, is upset with her. Lena successfully completes the mission and returns home with minor injuries. Miu had long wanted children, and after several attempts, they finally succeeded; Lena cared for Miu throughout the process, even while working on the case, though she ended up missing her son's birth. There was little sleep at home. Later, Lena rescues a young girl during a mission and eventually adopts her; the family adores the girl, Lin, and they care for both her and the mischievous Tim, keeping miu hands full. Despite her demanding job, Lena makes sure to spend quality time with them all.
