A program titled "Today′s Science" is on the verge of abolition due to its poor ratings. Seoyeon, the producer in charge, is in trouble both inside and outside. The boss urges Seoyeon to find new subject matters. Even the staff don′t support her. The writer and the producer are preoccupied with their own ideas/ But this episode of "Today′s Science" could be someone′s dream or imagination in their head. Or even it’s a grim fact, it always comes in contact with the exit to fantasy. Ruby is a multi-dimensional film, so to speak. The creativity and imagination of Ruby is attractive as it deviates from the usual creative gravitational pull of the subject and center. Let′s listen to the words at the beginning of the movie, "We are the main actors, directors, writers and only audiences."