Accio is iritable, explosive ans a trouble maker. He fights every battle like a war and his parents despair. His brother Manrico is handsome, charismatic and loved by all, although underneath he is equally as dangerous. Mio fratello e figlio unico follows the adventures of these two passionate brothers in small town Italy in 1960s and 70s as they fight over politics and over the same woman. It is about escaping and returning and knowing when to fight and when to grow up. Fifteen years of Italian history pass by as these brothers realize that despite their differences, they are really alike.