Bo has finally learned the truth about her mother – and that those closest to her have been keeping secrets about her past. Reeling, no longer sure who to trust, Bo decides to track down "Mommy Dearest" alone, in order to extract the truth about her own origins once and for all. While everyone frantically searches for Bo, Dyson visits an ancient Norn, a wish-granting, tree-dwelling crone, where – in order to protect the woman he loves - he makes a sacrifice that may irrevocably change his relationship with Bo forever. All these paths converge in a final face-off between mother and daughter that forces Bo to choose who will be saved…and who will not.