The world is shrouded in a "scarlet fog," and cities have become nests for eerie creatures. Humanity can survive only by relying on an endless circular highway. Everyone is bound to a "Survival Bracelet," which grants daily survival points that can be exchanged for supplies. After a three-day beginner protection period, extreme weather such as scorching heat, freezing cold, and acid rain arrives in rotation. Lin Yan has a golden finger called "Supply Analysis," which lets her identify the properties of supplies and optimize their proportions. Driving a modified RV, she sets out to find the legendary "Coastal Safe Zone." Along the way, she forms a survival team with four male leads, clinging to the highway as their lifeline and guarding a hope like a "last ember" amid despair.
