Billionaire Glenn Stearns takes on the daunting challenge of building a million-dollar business in just 90 days, starting with only $100 in his pocket.

Glenn hits a breaking point that sends him to hospital and threatens to shut down his mission of building a million-dollar business before it has started.

Glenn decides to take a risk and bet all the money he's earned so far on his most ambitious scheme yet, however there's a big issue with the new venture.

Glenn decides to double-down on his million-dollar idea with a bold new plan to expand the business, but a problem arises that could jeopardise everything.

Glenn is in hot water after losing a critical deal, and as the pressure mounts the rest of the Underdog team rally to flip a house that could save the business.

The Underdog BBQ team are up against a tight deadline as they prepare for their opening day, and Glenn may have let the cat out of the bag after a wrongly worded email.