Maelstrom, a thief who was caught by Carmen during her time as an ACME detective, escapes from prison, swearing revenge on her. At first, it is reported to the detectives that he died during his escape. Zack and Ivy find out that Maelstrom is alive and see the opportunity to catch both Carmen and Maelstrom. However, when the detectives sneak aboard Maelstrom's ship, he captures them. (thetvdb.com)