In the war's aftermath between Heaven and Hell, everyone else has found their place in the world, except for Tenshi. The changes in his soul in becoming a Life Angel have left him wondering where he belongs in the world and in Emica's life. When a letter arrives claiming to be from her parents, Tenshi questions his place in her family even more. They head off to Saiko Lake, along with their best friend Taro, to find her parents. What was supposed to be a simple trip turns into a nightmare when a dark, frosty shadow from their past re-emerges. More than just the human world is threatened by the bitter cold lust of the Blue Dragon. Incomplete clues left behind by a dead friend are Tenshi's only hope of saving the world and the woman he loves. Can he untangle these clues before all that he holds dear freezes to death?