One weird morning, they just woke up to see an entirely familiar faces but entirely opposite attitudes. The group freaked out, of course, and they tried to get out of the totally reversed world. But they can't! They're stuck with their opposites, and each side tries to change one another. It's good old Girls' Generation versus the 'We Don't Give A Damn' Girls' Generation! Who's gonna succeed? Come on, let's find out.