It's been two years since their debut. Things have changed. Too many to count.

They work around vastly separate schedules now. Performances are squeezed in between interviews, sitcom and movie filmings. Jin Young's time is filled by his modelling contract by Vogue. CNU's schedule is packed with his dedication to the Dream Team and his filmings for the new movie. Baro and Sandeul, in addition to the various variety shows they star in, are pursuing solo careers in their talents. Gong Chan is taking extra courses in Mathematics, hoping to be able to get a Bachelor's degree in Mathematics soon enough.

Chanshik hardly sees much of his hyungs these days. There's hardly a minute when they're all physically together, other than performance time. Their promises to stand by each other forever lie forgotten in the dust. Career is the only thing that drives them now. But Chanshik can't blame them, because they're doing it for the sake of B1A4, right?

But things start to change again. Something has happened to one of the members. Someone is holding a secret from the rest of them. One of them has been broken.

And Chanshik is determined to uncover the truth.