Nerve (2013)

Jakob Evans suffers an emotional breakdown after the death of his wife in a car accident. His loss and pain runs deep as he claims to have found her in bed with another man just before she died. Unable to accept her death and her infidelity, Jakob decides his only chance at closure is to find the man she was sleeping with to help him comprehend what they shared. With the help of Grace, a promiscuous and troubled girl, Jakob starts to put together the pieces of the puzzle and track down his wife's lover.