A possible concise summary is:
Charlie, a jewelry store employee, runs into his old friend Jake, who claims to be a successful affiliate marketer. Jake convinces Charlie to invest $25,000 with him and promises to double his money in a month. Charlie also gives Jake his fiancée Tyra's engagement ring as collateral. Jake turns out to be running a Ponzi scheme and gets arrested by the feds. Charlie manages to sell Jake's paintings and pay back his boss and the other victims. He also gets Tyra's ring back as a gift from the grateful victims. He learns his lesson and decides to save for their future home instead of chasing easy money.
Here are some possible facts extracted from the text:
1. Jake is an old friend of Charlie from high school.
2. Jake buys a painting called the Maxwell from Charlie's jewelry store for $10,000 with an American Express black card.
3. Jake invites Charlie to his luxurious house and offers him to invest in his affiliate marketing company, Conway Ventures.
4. Charlie gives Jake $25,000 of his savings and his fiancée Tyra's engagement ring, expecting to get $75,000 back in a month.
5. Jake gets indicted for running a Ponzi scheme and scams dozens of people, including Charlie.
6. Charlie sells Jake's paintings to Mrs. Murray and uses the money to pay back his boss and the victims of Jake's scheme.
7. Charlie gets his fiancée's ring back as a thank you gift from the victims.
8. Stevie is another old acquaintance of Charlie who ripped him off on baseball cards in the past.