After countless long and cruel criminal investigations, the head of the criminal police team Choi Young-jin finally dragged her tired body back home.However, what awaits her is not a moment of peace—she has to raise her young daughter Xiaen alone.As a single mother, she faces not only the trivial pressure of life, but also the desire and guilt for family affection deep in her heart.No matter from any angle, Ying Zhen is already carrying a mountain of weight on her shoulders.But everyone knows that the two originally parallel tracks of work and family will eventually collide violently at a certain intersection of fate, bringing unexpected storms and costs.