Introduction: Eustirel Castiel is the youngest daughter of the most venerable House of Castiel, a noble lineage stretching far into the kingdom's past. Her elder sister only recently awoke from a great illness. Following her recovery her strange actions and altered personality confound her younger sister. As Eustirel sets out to observe and investigate her sister she has no idea how her innocent worry will cause a growing madness to eclipse her once happy life....