Jae Cho doesn't have much luck at playing games. But when she watches her brother Dal playing Castle Crusaders 5 the game's various strategies fascinate her. One day when Dal leaves the game running on his computer Jae can't resist playing for herself. Before long she's hooked on the game and secretly playing against other online whenever she can. However she soon accidentally enters an esports competition in her brother's name! Will Dal be angry that Jae has been using his computer and played as him? Or will he help his sister dominate at the tournament?