An architect designs the family’s unconventional hillside home, its stair-stepped rooms and open-plan layout maximizing natural light while integrating recycled historical materials—a testament to his inventive fusion of practicality and aesthetics. Initially unprepared for parenthood, he navigates the shift from carefree bachelor to overwhelmed father, grappling with the dual chaos of a newborn and a resentful toddler. Frustration and self-doubt mark early attempts at childcare, though he gradually leans into active parenting: faltering bicycle lessons, adapting to domestic unpredictability.

Flashbacks trace his romance with the mother—courtship, marriage, adopting their dog—while a subplot reveals his reckoning with past emotional distance during their first child’s infancy. Acknowledging her disproportionate sacrifices sparks tentative strides toward shared responsibility, though his parenting remains uneven.

His son’s time-travel unveils a lineage steeped in resilience, including a great-grandfather who endured wartime hardships—a legacy subtly mirrored in his insistence on perseverance during their bicycle sessions. Professionally, he juggles architectural projects from home, striving to align career ambitions with family life. Incremental growth emerges through steadier communication with his spouse, halting efforts to divide household duties, and curating family heirlooms, all while clinging to his creative identity amid the beautiful mess of fatherhood.