So during this fight which lasted an hour 15 min.
We were getting rocked really hard. Our mid was getting destroyed by trist, and our solo top (riven) was getting rocked by teemo and malphite while our bottom was also suffering just as much. On many gank attempts it was an equal trade that resulted in us losing towers and such.
We got pushed into our base. We desperately tried defending our inner circle towers but it was a lost cause. Next the enemy forces did baron, pushed our towers down. but we killed them slowly 1 by 1. They harrassed inhibitors while we pushed them out constantly. After the enemy's multiple baron runs we held off. After a few successful back dooring attempts we finally pushed through only to be chased away.
Then the enemy malphite made a tactical error. he tried soloing a lane. we rushed out ganked him. Then we ported back to our base. Ganked xin zhao, and pantheon, then teemo, and as tristana ran away we ganked her too. Then as if we were running for boobs, we rushed into their base, killed their inhibitor and nexus. and won the game.
it was the most epic comeback ever