After losing her fiancé Youji in a climbing accident, Mai resolves to carry his child through advanced genetic research, but the steep costs force her toward an unconventional line of work. She applies to join a specialized team that gathers genetic material for clients seeking children from specific donors. To prove her commitment before acceptance, Mai must complete a trial by approaching a complete stranger and securing what is needed. As doubt and determination collide, she questions whether she can set aside her reservations to fulfill her deeply personal goal.