Hey got a quick newbie question.

Am playing on my Android phone. I have finished the first 3 missions or chapters and turned the game off, when I come back I go back to the town. How do I get back to the chapter that I left off? Do I have to redo the previous chapters to get back to where I was? Right now when I click on "quests" it says Klutch (forest Haven ch 4) has more to tell you...