The invisible string theory is the idea that people are connected by an unseen bond that transcends time, space, and distance. The theory suggests that everyone has a person in their life who is connected to them by an unbreakable string, and that this relationship is determined by fate rather than choice.

Claire and Nate have many things connecting them even before they ever met

-They went to rival high schools and attended many of the same events

-They grew up 5 miles apart from each other

-Both of their grandparents lived on the same road

-They worked out at the same gym following them moving home from college

-They both were college athletes in Southern California that both played in the CCAA