As Jon reported (when talking about the Amanda Seyfried casting), I’m.mortal is set in a future where the gene that causes us to age has been switched off, resulting in a growing population and a society where time becomes a form of currency. IMDb explains it as follows (care of THR Heath Vision):-
In the not-too-distant future the aging gene has been switched off. To avoid overpopulation, time has become the currency and the way people pay for luxuries and necessities. The rich can live forever, while the rest try to negotiate for their immortality. A poor young man who comes into a fortune of time, though too late to help his mother from dying. He ends up on the run from a corrupt police force known as ‘time keepers’.
This morning we have news from THR that Cillian Murphy, fresh from his role in Incetion, may be added to the necessarily youthful-looking cast. Murphy is said to be in final negotiations to play an officer of the afore-mentioned police force, an officer “as precise as the time he keeps”. Sounds cryptic. As we have seen in everything from 28 Days Later, through Batman Begins, Sunshine and Inception, Murphy can play edgy, menacing and sympathetic roles with equal ease, so it will be interesting to see (and difficult to predict) how this role might play out.
I’m.mortal is believed to be gearing up to start shooting in September.