Twilight, asked by Princess Luna herself, was tasked to lead an expedition to a recently uncovered monument thought lost to Equestrian History: A castle in the north that was thought to be Sombra’s original home before his reign over the Crystal Empire. Twilight, together with the help of A.K. Yearling to assist her and a team of archeologists, they seek onward to uncover the castle’s secrets.

However, some shadows should be left alone, and the secrets within left unseen...