Ex intelligence agent Ki-heon is tasked with safely transporting Seo Bok, the first ever human clone, who holds the secret of eternal life. Several forces try to take control of Seo Bok to serve their own agendas.

In the children’s ward, there are children whose last opportunity is organ transplantation. Even when they say that dying is only a wish, they build affectionate friendships without losing their smiles. Fathers of these two children fight desperately to save them, and they face only one last choice…

Twelve-year-olds Haesu and Seon have been longtime friends. Seon has always followed Haesu's lead, never making decisions for herself. But when she finds out that Haesu is moving to the U.S., she's thrown into confusion. That very day, Haesu falls into a pit deep in the mountain behind their neighborhood.