Elektra the warrior survives a near-death experience, becomes an assassin-for-hire, and tries to protect her two latest targets, a single father and his young daughter, from a group of supernatural assassins.

When Mystery, Inc. are guests of honor at the grand opening of the Coolsville Museum of Criminology, a masked villain shows up and creates havoc before stealing the costumes of the gang’s most notorious villains…Could it be that their nemesis, mad scientist Jonathan Jacobo has returned and is trying to recreate their deadliest foes?