After the defeat of the demon lord Hadlar all of the monsters were unleashed from his evil will and moved to the island of Delmurin to live in peace. Dai is the only human living on the island. Having been raised by the kindly monster Brass, Dai's dream is to grow up to be a hero. He gets to become one when Hadlar is resurrected and the previous hero, Avan, comes to train Dai to help in the battle. But Hadlar, announcing that he now works for an even more powerful demon lord, comes to kill Avan. To save his students Avan uses a Self-Sacrifice spell to attack, but is unable to defeat Hadlar. When it seems that Dai and Avan's other student Pop are doomed a mark appears on Dai's forehead and he suddenly gains super powers and is able to fend off Hadlar. The two students then go off on a journey to avenge Avan and bring peace back to the world.

Making friends after moving to a new town can be a challenge. That's the case for Ava, a 13-year-old who's just moved to a new town and finds herself missing her old life as she begins attending an unfamiliar school.

Pitbull is a fast-talking master mechanic who has built his business from the ground up. He counts every cent and never throws anything away. Pitbull has started a new custom car business with the world-famous Bangladeshi car designer known simply as Leepu, a colorful creative who takes junk automobiles and transforms these wrecks into stunning supercars using nothing but old hammers, sheet metal and spare parts. Together, Leepu and Pitbull turn junk into gold and build affordable custom muscle cars for the average Joe. Leepu is a brilliant designer, while Pitbull has gasoline in his veins. Each episode, a customer with a great story, small budget and sad old jalopy asks Pitbull and Leepu to transform his or her junker into a cool customized muscle car. This odd couple experiences highs and lows while hunting for spare parts, ingenuous fixes and inspiration. Can these two homegrown geniuses from two different worlds work together and realize the ultimate American muscle car dream?