Grandad and Musa made a time traveling in order to save their vicinity from Arabs by deciding to bring back Babak. What happens to them will be in episode 7. Our heroes travel to 838 AD, but they find themselves in different years because of improper using of the device. While time traveling they meet several historical persons, but they hardly find Babak eventually. The day they find Babak, it's his execution day. They must save Babak from execution.