In 2014, Homeland Security Agent Justin Deutsch inherits a case concerning an international fraud and money laundering ring. Callers from "boiler rooms" pose as investment brokers and peddle stocks that don't exist. Working on tips about suspicious bank accounts in Florida, Deutsch and other agents follow the money – eventually leading to the ringleader, Mary Marr. The investigation unravels a scheme that defrauded hundreds of victims around the world out of millions of dollars.