Emma Swan (26) is a school teacher, with a 4 year old son, Henry. She has no other family, and Henry's Dad is not the most reliable. Killian Jones (28) is a soccer star from Ireland who played in English Premier league, he suffered a severe injury, and now has to take some time off. One of the best players, up there with Beckham and Ronaldo, the striker Killian is forced to take a break from professional playing. His family lives in New York, and Killian locates there to take it easy and finish physical therapy. His sister in law, Regina, the principal of the school that Emma Swan works at, hires him to coach all the soccer teams in the school and high school. He begrudgingly accepts it, even though he despises the idea of dealing with little kickers, not like he doesn't enjoy kids, he loves them, just prefers to be back on the field himself.
He coaches the little league Soccer team, that Henry is on, and meets Emma, and she's immediately taken with his natural way with her son. Henry not having any reliable father figure, attaches to Killian, and hopes his mom will too.