"All that I ever felt was drowning, 22 years ago and now as well." "You can't leave me, Jimin" "I won't let you." Lee RaeYun and Lee Dong-Wook have been the best example for siblings from a very young time, Park Jimin, who's helplessly in love with Rae has overlooked all obstacles that has proven to try to wreck their relationship. but what will happen when the one-month trip to jeju ruins everything Rae-Yun and Dong-Wook have hidden over the years? what will be Jimin's decision when he realises that Rae's love for him might have been nothing but obsession and a simple mask parade? read to find out.