As Bethany, the baby sister of the family, steps up to support her sister-in-law and brother through their infertility and cancer diagnosis, she steps into the role of a gestational surrogate. Determined to push herself beyond her comfort zone, Bethany faces a year of medical and legal challenges. She thinks she's prepared for the emotional, physical, and family changes that come with her decision but is soon surprised by shifting family dynamics and even questions her own motivations for surrogacy. Is she building up her family, or is she building up herself?