Twice maknae line, Tzuyu, Chaeyoung, and Dahyun has been accidentally become a baby for 30 days after they drink a juice that has a sample for becoming young. They receive it from a scientist named Prof. Furi.  The only solution of this is to wait 30 days for them to come back to normal.  Can the Twice Unnie line successfully became their guardians as well as find the scientist who done it to them or not?