Pat Solatano's Theory Of Silver Linings

This is a story of a mentally ill man who, after spending time in a psychiatric institution, has to learn how to live a normal life without his former wife who has left him. Pat is a man with bipolar disorder who used to work as a school teacher but due to his stay at a mental institution, he now has to move back to his parent's house. His wife Nikki has left him because he beat the man (history teacher was sleeping with Pat’s wife) almost to the point of death. Yet he cannot help believing she will come back to him and that they are meant to be together. Continuing his life in the real world proves quite difficult for Pat as he is incredibly disoriented and though he only spent eight months in a psychiatric institution, Pat Solatano winds up living with his parents.
Things get complicated when Pat meets Tiffany (a widower whose husband just died), who offers to help him reconnect with his wife if he will do something very important for her in exchange. Pat refuses to give up on Nikki and decides to become a better version of himself with the hopes of getting Nikki back. Having formulated a theory about silver linings where his life is a movie made by God, his mission in life is to become physically fit and that he is meant to be with Nikki - he decides to become the better version of himself and attempts to do so by running every day. His friend, Ronnie invites him to dinner and he meets Ronnie's sister-in-law, Tiffany who's also reeling from a personal loss. They make a connection but Pat is devoted to his wife refuses to do anything. At dinner, Pat meets a girl - Tiffany - a clinically depressed young woman who has moved back home after the death of her