Young-goo the son of mafia boss Don Carini, is too foolish to be part of the mafia elite. One day, Young-goo comes to his father and is trained by Tony V to be his father's successor. A few days later, Young-goo accidentally rescues Nancy, the only daughter of Don Bonfante, the boss of a rival mafia family. But Vinnie, an under-boss of the Bonfante family kidnapped her and fabricates that Young-goo has taken her. Vinnie's behavior provokes an armed conflict between the two families.

Wonder Girls have arrived, and they are taking New York city by storm! The girls arrive in New York city to prepare for their U.S. tour but because of their fun, mischievous personalities they enter themselves into the Apollo Amateur Competition under the stage name, "The Asian Invasion". Their amazing performance wins them a spot in the finals but also stirs up trouble with the reigning champs... The School Gyrls. Join Yenny, Yubin, Sun, Sohee, and Lim on this hilarious journey as they navigate their way through friendships, rivals, loyalty and crushes to prove they have what it takes to make it in the Big City.