As the story unfolds, we're taken to an older Oliver, seemingly confessing to something significant. In the film's third and final act, audiences are hit with a revelation as Oliver has been spilling his secrets to none other than a comatose Lady Elspeth (Rosamund Pike). It's at this pivotal moment that Oliver's grand plan comes to light,
Turns out, Oliver orchestrated his meeting with Felix at Oxford, framed poor Farleigh (Archie Madekwe) for stealing Catton family treasures, and had a hand in Felix and Venetia's (Alison Oliver) deaths. He poisoned Felix in the hedge maze and offered Venetia a razor blade, cleverly exploiting her vulnerable state.
Oh, and that casual run-in with Elspeth at the café? It was all part of Oliver's cunning plan, hatched after he discovered the demise of Sir James (Richard E. Grant). We learn that, before slipping into a coma, a weak Elspeth handed over all her money and the keys to Saltburn to Oliver.
In the end, we learn that Oliver's grand scheme was to seize the Cattons' wealth — and Saltburn — for himself. Now that's a plot twist that'll leave you speechless on your journey home!