Mati doesn't want to live anymore after the loss of his wife. She was everything to him and he thinks that life has no point without her. He has a job in a library and there is Ruth, who has secretly loved him for years. Life of her daughter Mari is a mess and she would need a help herself.
Mati just wants to get away.
Then out of nowhere shows up a restless Sass, a friend of all the troubled people. Sass starts to teach Mati how to live. Mati has now a friend, of whom it's almost impossible to get rid of.
A Friend of Mine is a warm drama-comedy about the deep loneliness, which can only be cured by friendship.