In this gripping installment, Reginald Musgrave, the heir to Hurlstone Castle, shares intriguing details about the missing project manager, Richard Brunton, alongside Mariana Ametxazurra, who provides sharp observations on-site. The team navigates cold conditions while uncovering a recent confrontation over drugs. They discover a medieval battle axe with mystery surrounding its use and puzzling sightings of Brunton on the castle grounds. Just when the tension peaks, Mariana spots a chilling face under the ice, setting the stage for an unpredictable investigation.