Regina Mills is unable to get pregnant, she's been to every Doctor possible and no matter what, she will be unable to carry a child. She decides to adopt, and adopts a boy, Henry, when he's only a few weeks old.
Killian Jones is a widower, raising two little girls. His daughter Dawn, not even 3 years old yet, and his newborn, Molly, who just left the hospital, after being in the NICU, after a difficult delivery, that took the life of her mother, Emma.
Killian and Regina meet one day at a park, when Regina is trying to calm a very fussy Henry, and she's terrified that she's doing something wrong.