The ongoing war between the canine and feline species is put on hold when they join forces to thwart a rogue cat spy with her own sinister plans for conquest.

A kid, his new friend who's a girl, his grandmother and their old neighbor who used to work as a driver for a gangster, search for the treasure supposedly hidden nearby by the gangster long time ago, to help the neighbor keep his house.

Madeline is married to Ernest, who was once arch-rival Helen's fiance. After recovering from a mental breakdown, Helen vows to kill Madeline and steal back Ernest. Unfortunately for everyone, the introduction of a magic potion causes things to be a great deal more complicated than a mere murder plot.