Year Seven — Theme Song: The Blue Light This takes place in the seventh year of the Broadcast Era. The starships Blue Space and Gravity jointly issued the gravitational wave broadcast, and the Trisolaran world was destroyed. I often wonder: why did the Trisolarans ever let us go? We destroyed their home world too. But the truth is, they didn't let us go. This is not merely a story of ruins. It is the story of what came after.