Liruo City in the 22nd Century
The city of joy for humanity and wisdom
Lively and revelry, singing and dancing every night, camping parties
Except it's hard to find a job
Everything else is perfect
Until——
Dubri disappears
Dubri is the head teacher of the school
Dubri people are not bad
Who is Dubri?
Why did Dubri disappear?
Behind the disappearance of Dubri
Involving a bigger mystery
A mystery related to the safety of Liruo City
Concept: artificial intelligence
