Krystal, Amber, Sulli, Luna and Victoria have been best friends since grade school. Somehow, they have managed to go through everything with each other. So, they are certain when they send in their applications to the most prestigious academy in South Korea, Seoul Academy for Young Adults (often being called '^_Wonderland' because of all that comes with joining the school everything is 'wonderful') - the five are sure they will all get through. 

When the results come out, they are surprised to see that only Sulli and Amber were not accepted, while the other three were. The five do not want to be separated so they come up with a plan. A very dangerous and daring one that could get them in trouble. But who cares? As long as they're together.
 

Let's just hope they don't get expelled before they can enjoy all the fun at Wonderland.