A group of friends who like to solve mysteries have to face the past as multiple enemies from their past show up and begin wreaking havoc on the city. They must find a useful way to defeat and put a stop to their past enemies once and for all.
The Mystery Inc. gang must save Coolsville from an attack of their past monsters brought to life by an evil masked figure trying to take down the gang.
A group of friends who like to solve mysteries have to face the past as multiple enemies from their past show up and begin wreaking havoc on the city. They must find a useful way to defeat and put a stop to their past enemies once and for all.