It's a university festival day, where anybody can meet someone new. There are three men in the robot club, self-claimed Smart Avengers of the Engineering College. At this time, a straightforward girl, Hye Jin comes crashing into the timid boy, Hwi So's life. A great friendship develops between the two and together with their friends, they work through their individual challenges and solve an engineer's biggest question: Does technology really solve all a person's problems? (Source: bread-tie-twisty at MyDramaList)