McKellen will star as Sherlock Holmes in Bill Condon's "A Slight Tick of the Mind," reports Deadline. The film will follow Holmes' later years, which is seemingly the reason producer Anne Carey cast the 74-year old actor.
A press release published by Buzzfeed describes the plot:
In 1947, Sherlock Holmes, long retired, lives in a sleepy Sussex village with his housekeeper and her amateur-sleuthing son. But far from living out a peaceful retirement, he is haunted by an unsolved case from fifty years ago. He remembers only fragments: a confrontation with an angry husband, a secret bond with his beautiful but unstable wife.
"A Slight Trick of the Mind" will begin filming in April, but Archer Gray Productions has not set a release date.