This story is a sequel to Cold Days and Warm Hearts
The winter passes into spring, bringing with it many changes, both for good and for ill. Dawn Lightwing must contend with the pending disaster as a powerful adversary approaches with designs to end his life. Rainbow Dash finally leaves to join the Wonderbolts, but finds her dreams jeopardized by somepony from the past. Meanwhile, Twilight Sparkle and those close to her are drawn further into the machinations of the Noble Court.
Oh...and somepony is planning to destroy the world...probably...maybe...let me get back to you on that...