The campaign map allows you to embark on different adventures in the game.
To enter the campaign, tap on the campaign icon at the centre of the screen.
You will be directed to the main campaign map, where you'll also see your current progress on your missions. The selected location is marked with a green arrow.
If you want to, you can visit previous locations to play the scenarios.
Once you've picked a location, you will see a scenario screen. Each location has three scenarios. To move on to the next location, you have to complete all three scenarios.
In order to enter the scenario, you have to have sufficient amount of stamina. The cost to enter is stated on each scenario button. More info on scenarios can be found here.
After You chose a scenario you can select a helper from one of your friends this hero will help you in the next battle as an extra hero