Following her mother's passing, Rin makes a promise to herself to become a Lady and embarks on a journey to England to reconnect with her kin. Upon arriving, her reception is less than warm, particularly from stepsister Sara. Despite the initial friction, they eventually grow close as a family. Lynn, as Rin now goes, uncovers a fiery passion for horses and races and experiences success in various competitions. The series, bifurcated into two parts, chronicles Rin's early years in the first and her teen years in the second.