In need of money, a boarding house owner's brother heads off to an island to find a precious stone but must fend off several bumbling treasure hunters.
Raisa gets a mysterious birthday present containing Bi Asuh who claims to be a maid. Instead of alleviating, Bi Foster actually creates a lot of problems. Besides Raisa's grandmother suffering more, her sister also disappeared. Raisa also had to ask the help of her friends to find her sister and drive Bi Foster.