Masha is a 3-year-old girl who is portrayed as naughty and hyperactive and always thinks about playing. The bear is a retired circus Kamchatka brown bear who lives in a house hollowed out of a tree in the forest. Masha inadvertently inside the home of the Bear, while playing there, she makes a big mess. The Bear sees the disaster caused by Masha tries to get rid of Masha, but he is unsuccessful, and he and Masha become friends.