Rhona and Flint struggle with being thrust back in time, and finding themselves prisoners in the clutches of Enchantress Zorreale and her ruthless mercenary captain, Ragar. The dark dungeon becomes a stage for sibling tension and emotional unrest. A mysterious, feverishly mad cellmate becomes an unlikely ally, revealing a connection to their long-lost father, John Thatcher. Amid the confusion the Thatchers hatch an escape plan from the dungeon’s depths with their deranged fellow prisoner known as ‘Cardigan.’