Remy adores her Mommy and Daddy. Mommy and Daddy are architects, and while walking together to her first day of school, Remy learns that they helped design one of the houses in the neighborhood. Upon arriving at school, Remy sees her neighbor, Emmett, who announces he has a new baby sister who was made with "a lot of love and a little bit of science."Remy begins to wonder about how she was made and rushes home after school to find out the answer. Together, Remy, Mommy, and Daddy 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.