Childhood sweethearts Ha Jin and Hyunseong are torn apart by life and family changes. Hyunseong's father died in a traffic accident and Ha jin's mother died due to eye cancer. When Ha Jin's father remarries, she gains a new family and bevy of new problems. With a new, stepmother, introverted stepbrother who is falling for her, and a envious stepsister poised to ruin her life, Ha Jin has her hands full while hyunseong studies overseas. Year later, tragedy strikes when a car accident causes Ha Jin to lose her memory. She starts a new life without her childhood love to hold her back, but when fate brings Hyunseong back into her life, will these two finally be able to be together?