You start the bank heist in the sewers, accessible from the manhole outside the factory or the manhole outside the clothing and general store. When you walk along the sewers, you will see big walls.
If the barriers are up, as shown on the left, it means the heist is on cooldown as it has been completed recently. You need to wait for the wall to be fully repaired before you can start the heist, as shown on the right.
When the walls are ready, you will need to stand next to the walls and double click them to start breaking them down. It takes 15 seconds to break them down.
Once the walls are broken, the heist timer will start.
In the vault entrance room, there are 4 sets of tripwires, each 5 long. The path through the tripwires is random each time, consisting over 1 safe square in each row. Triggering a tripwire will increase the fail counter and send you back to the start. If the counter reaches 10 fails, the police are called.
Once you're in the main vault, you need to kill the guard. The guard will shoot back at you, so be careful! The player to get the final hit on the guard will receive a bank ID card. Use the ID card while on top of the action point to open the vault gate.
The guard will call the police when you attack them.