Whose side are you on? As the tide of public opinion turns inexorably against Marvel's heroes, the gears of Civil War threaten to crush the young heroes known as the Runaways. But when the Young Avengers off er their assistance, will the Runaways believe they're on the same side? The warden of the prison called the Cube wants both teams taken down - and he sends his most powerful weapon to do it: Noh-Varr, the young Kree known as Marvel Boy! Can the two teen teams put aside their differences and work together to free their captured teammates? COLLECTING: CIVIL WAR: YOUNG AVENGERS & RUNAWAYS #1-4.