Oliver and Felicity are trapped in the bunker after Adrian seals the doors and sets off an EMP bomb. While they try to get to the surface after Oliver is badly injured, their teammates try to find a way to help them.

To force Oliver to get him out of prison, Adrian has his allies capture Curtis, Quentin, Thea, Felicity, and Diggle. Oliver has no choice but to gather new allies to stop Adrian and his team.