A heroic group of teens sheltered from the dangers of the post-apocalyptic world receive a message that inspires them to leave the safety of the only home they have ever known and embark on a cross-country journey to find the one man who can possibly save the world.

After washing ashore in France, Daryl struggles to piece together how he got there and why, as he navigates a fractured, walker-infested landscape to find his way home. During his journey, Daryl has to protect a young boy, Laurent, who is seen as a messiah, while facing new, dangerous walker variants and the "Power of the Living" paramilitary group, as the connections he forms along the way complicate his plan to return home.

In the near future, breathable air is nonexistent. Virtually all of humanity has disappeared, and those chosen to reestablish society reside in a controlled state of suspended animation. Two engineers tasked with guarding the last hope for mankind struggle to preserve their own sanity and lives while administering to the vital task at hand.