Rick and his group make a risky run into Washington D.C. to search for artefacts they will need to build the civilisation he and Carl envisioned. The communities join forces to restore a bridge that will facilitate communication and trade; someone is gravely injured at the construction site. A mysterious disappearance from the work camp threatens Rick's vision for the future. Rick's vision of a civilised future is threatened by a sudden reckoning with past sins that remain unavenged and unforgiven. The group unmasks a disturbing and dangerous new threat. An escaped captive revisits his past.