Sage and Dan Jackson are two siblings that somehow stuck together through the apocalypse, until one day. Dan went out for a run while Sage stayed to watch a little girl named Lizzie, who they adopted through the apocalypse. When Dan doesn't return, Sage is sent into a panic state. She has to watch and raise Lizzie on her own. The two girls travel from camp to camp, never staying at one for too long. Sage soon finds herself trapped in a group when all she really wanted was her brother and apocalypse-adopted little sister back. She has no idea where they are, and will stress and force herself into finding a trace of them, no matter what it takes. The group that adopts Sage tries to convince her to stay with them, but Sage is determined to find her siblings, and won't give up. She will fight to find them, with or without the help of the group. Sage finds herself falling for the man that helped her in the woods as they go on runs together, and as he helps her find her family. Sage is lost. She doesn't know what to do.