Wayde McKelvy and Troy Wragg stir up enthusiasm for their company, Mantria, and a green energy revolution they promise in the form of a product called “biochar.” Their “garbage to gold” scheme attracts scores of investors and even the attention of former President Bill Clinton. But soon the Securities and Exchange Commission discovers that Mantria is a Ponzi scheme, laced with bogus claims and false promises of enormous returns, ultimately defrauding investors out of millions of dollars.