Kaleb adores his Daddy and Papa. Daddy and Papa are architects, and while walking together to her first day of school, Kaleb learns that they helped design one of the houses in the neighborhood.Upon arriving at school, Kaleb sees his neighbor, Emmett, and learns that he has a new baby sister who was made with a "lot of love and a little bit of science."Kaleb begins to wonders if he was made the same way and rushes home after school to find out the answer.Together, Kaleb, Daddy and Papa explore what it means to be donor-conceived and how generosity and genetics combined to create a home built not just by architects, but by love.