Rollercoasters: a Study in Scarlet (Rollercoasters) -- Mixed media product

Dr Watson and Holmes embark on their first case together. A man is found murdered, with no apparent physical wounds and grimace fixed on his face. The police are mystified, but using his astonishing skills of deduction and logic, the famous pair uncover a story of deceit, love, revenge and murder than spans years and stretches across continents.