Harry was angry. He was angry that his friends had abandoned him. He was angry that no one seemed to believe him. And then he meets someone that does - a Slytherin that he had never noticed before. A Slytherin that he later learns is his soulmate.
Harry somehow ended up in the past during the battle in the Department of Mysteries. Now he's meeting his family, getting sorted into Slytherin, and falling for a Black. What could possibly happen?