A distillery owner is poisoned during a group tasting of his premium rum. But the case is shrouded in mystery when it's revealed all the guests drank from the same bottle. So, how could the killer ensure only the victim would wind up dead? As Seb's unorthodox methods prove useful to the investigation, Mervin learns an important lesson in slowing down. The team must dig deep into the past, uncovering secrets that our suspects have gone to great lengths to bury, in order to get to the bottom of this case.