Five-year-old Iseul goes out on her own for the first time to buy milk. Along the way, she dodges a bicycle, takes a little tumble, and has all sorts of small adventures. When she finally makes it home safely with the milk in hand, her mom is waiting for her at the front gate. This heartfelt picture book delicately captures a child's proud feeling of 'I did it!' and the joy of accomplishing something all by herself.