Family sells house and leaves behind aquarium and fish. Caretaker is hired before new owner moves in. A fight broke out between the fishes over dominance. Mangu a small brave fish risked his life to save others and collapsed caretaker.

The family sold their home and moved to another city, leaving behind only their aquarium and its fish because they were difficult to transport. Until the new owner takes possession of the house, a caretaker is appointed for the fish. When the caretaker removed the partition glass from the tank, chaos erupted and there was a big mess in the aquarium between good and bad fish. Raka, the bad guy, started fighting for control. Among them was a small brave fish named Mangu, who was trying hard to maintain things under control in the aquarium. When the caretaker collapsed in the lonely house Mangu risked his own life to rescue him.