Original: It focuses on Cloud Strife who -- now living as a delivery boy alongside Tifa Lockhart and taking care of two kids -- is summoned to find the cause of '' Geostigma '' , a mysterious disease that proves dangerous to the city 's population .
Simplified: The three villains in the movie , Kadaj , Loz , and Yazoo , are trying to find the '' Cells of JENOVA '' .