At the Mardi Gras, Vincent is smitten by the lethal love trance of Nekera, a beautiful femme fatale. The gang thinks they must keep him from her kiss; however, Vincent knows that kiss will be Nekera's undoing.

Three hags are given magical powers by a witch trapped in another dimension. When the gang learns of their plot to overthrow the world, Vincent sets out to thwart the mist witch.

When the Time Slime tries to zap the gang, they take his Time Scepter and use it to show Scooby (who believes he is more of a hindrance than a help to the gang) what their lives would be like without him.