Xu Zeqing, a qualified social worker, died suddenly while working overtime and was accidentally bound to the system "Rainbow".
The system "Rainbow" promises that after Xu Zeqing completes a certain mission world, it will allow Xu Zeqing to return to the original world and eliminate physical diseases and distribute rewards.
In the mission world, there are many dangers. It depends on one person and one goal, how to survive in the mission world and pass the level.
Concept: How do little people survive in the strange ancient times?