An ordinary girl, Lu He, was attacked by a genetic monster called "Tit-Tat" in the Star Dome Mall. In order to save others, she volunteered to become a member of the Sealing Formation. However, she was involved in the conspiracy vortex of the transnational criminal organization "Ouroboros" and the resistance organization. After experiencing betrayal, sacrifice, and desperate situations, she reached a "symbiosis seal" with the monster, and the power of another dimension turned into a mysterious mark on the back of her hand. When she thought she was free again, she discovered that——
The brand is the cage, and symbiosis is the beginning.
The real laboratory of Ouroboros is hidden beneath the mall, and undercurrents are surging within the resistance organization. And the police detective Lin Feng, whom she once trusted but also suspected, still holds the last trump card. When the lights of the mall came on again, enemies disguised as tourists had blended into the crowd, and the mark on the back of Lu He's hand began to feel hot...
This is a story about courage and sacrifice, trust and betrayal. The girl will take her "little monster" under the glass dome of the Star Dome Mall to fight to protect every ray of warm light in the ordinary world.