Kai has been in the foster system since his parents could no longer care for him how they wanted to, so they decided the best thing to do was let him go to a family who could give him everything they couldn't. They returned to their home country in Asia, so they could get help from their parents. They left Kai with a letter explaining how much they loved him and that all they wanted was for him to find a family who would love him as much as them and give him everything they couldn't #phdfoster