Sanasar passed away. His elder son - Vergo isn't inhered his father's boldness and power. The other two brothers - Hovan and Mher are too young to step onto the trone.
A mighty Caliph of Baghdad - Msrah Melik - hearing of the death of Sanasar, marches on Sassoun and levies an annual tribute.
Mher - Sanasar youngest son - is only seven by then. He has his father's supernatural power. As he grows up, he becomes Sassoun's hero. He takes the trone and faces his people's enemies. He defies Msrah Melik.