Remember (2015)
While exploring available films on Prime on a day when all of the TV channels were offering nothing but crap (it was probably a Thursday!), we happened across this film.
It started as apparently quite an ordinary offering, but soon became gripping, ending in a distinctly 'twist in the tail' finale.
I won't say any more about it, other than it involved a Jew having escaped a Nazi death camp trying to find one of his tormentors and would-be murderers.
Excellent and highly recommended.