The chatty little fox Nicole is adopted by an aristocratic lop-eared rabbit family as the younger sister of Ian, an autistic boy. With constant companionship and courage, she helps Ian recover from the trauma of abuse by his former piano teacher, pulling him out of seclusion and guiding him back to the music stage. In return, Ian regains his voice and dreams while protecting his sister. To prove herself, Nicole learns to play the piano from scratch and wins the championship at the New Star Concert. The unrelated brother and sister finally achieve true mutual redemption.