Well, I don't think we could understand it, do you? Spoilers ahead! 'Grid' tells the story of Kim/Kwon Sae Ha (Seo Kang Joon), an employee of the Administration Bureau, who witnesses a murder and detective Jung Sae Byeok (Kim Ah Joong), who has been the one in charge of the murder investigation until the case is transferred to the Bureau. The two have somehow gotten entangled in the case for the same but different reasons: the Ghost. The Ghost (Lee Si Young) is a time-traveling woman from the future who is also the founder of the Grid, the defense shield protecting the Earth from the solar flare in 2005. She is also the one who killed Sae Ha's father and the person who helped the murderer Kim Ma Nok evade the police. She appears before Sae Byeok while the latter is chasing Ma Nok and disappears right there and then---the reason why Sae Byeok is looking for her. I am not a big fan of Science Fiction, especially those poorly made ones, but I remember getting excited about...