By Jonathon Dornbush
Updated April 20, 2015 at 04:17 PM EDT

The big mystery facing Sherlock Holmes in his latest on-screen adventure is a strange one—his own life.

In Mr. Holmes, Ian McKellen stars as an older version of the famous detective, who is finally penning his own story about his life to correct the misconceptions that have already been written about him. So Sherlock, at the age of 93 (requiring McKellen to play almost two decades above his own age), sets about recalling a case in his life from 35 years earlier.

The new international trailer for the film shows off more of the film’s plot as a new take on the classic character, a stark contrast from other modern on-screen interpretations, approaches its summer release date.

Mr. Holmes is set to release on July 17.