Spoiler Alert!
After a series of schemes and misadventures, the main characters (Griffin Bing, his best friend, and their friends) finally succeed in getting revenge on the corrupt, money-hungry businessman, Mr. Puckett.
Here's how it unfolds:
* The "Swindle" is revealed: The friends discover Mr. Puckett's plan to exploit a rare, valuable baseball card owned by Griffin's grandfather. Mr. Puckett intends to buy the card at a low price, then sell it for a huge profit.
* The Counter-Swindle: The kids orchestrate a counter-scheme to expose Mr. Puckett's greedy intentions and get their grandfather's card back. They use a variety of tactics, including creating fake newspaper articles, using a fake "expert" to discredit Mr. Puckett's appraisal of the card, and even getting the entire town involved in the "swindle" by promoting a massive "Card Hunt" that ultimately leads to the real card being "found" and returned to Griffin's grandfather.
* Justice prevails: Mr. Puckett's reputation is ruined, and he is forced to back down from his plan. He's also left with a sense of humiliation.
* Victory for the heroes: The kids celebrate their success, proving that even a "swindle" can be used for good when justice is at stake.
The ending of "Swindle" leaves a positive message about using intelligence, resourcefulness, and teamwork to overcome injustice and achieve a satisfying outcome.