Agent of special department "Piranha" Kirill Mazur and his colleague Olga go to the far north with the assignment to liquidate an underwater secret weapon lab in the guise of a mutual vacation. All of a sudden, they find themselves in the world where civilization laws are forgotten, and this deadly weapons are kept by gangsters who are controlled by a new "master of taiga" Prohor, whose leisure time is spent hunting at humans. Mazur didn't know that he would have to trade his familiar gun for a hand-made bone knife, and save his companion and himself instead of saving the world. For them, this safari in northern forests would be no less dangerous as for the live targets.

Doctor Baines has been conducting genetic experiments on piranhas and has made them virtually unstoppable. Unfortunately, his assistants, Maggie and Paul, accidentally release the hybrids into the Lost River Lake threatening to destroy everyone in their path. Can they prevent the flesh-eating piranhas from escaping into the ocean and spawning?

Natsu is unable to reveal her feelings to 'bento' (lunchbox) vendor Sone. Through the arrangement of Haruo, a man she has just met, she begins living together with Sone. But things aren't the way she expected them to be...

After a high-ranking North Korean official requests asylum, KCIA Foreign Unit chief Park Pyong-ho and Domestic Unit chief Kim Jung-do are tasked with uncovering a North Korean spy, known as Donglim, who is deeply embedded within their agency. When the spy begins leaking top secret intel that could jeopardize national security, the two units are each assigned to investigate each other.

Arjun is the ACP of Hyderabad, who gets involved in an accident which leads him to suffer partial memory loss. He must tackle his inner demons and confront external enemies who are trying to keep him from solving his friend and colleague Aryan Dev’s murder case. Eventually, Arjun solves the murder case and learns that Aryan has been killed by a man, who is a closeted homosexual. To stop Aryan from outing that man publicly, that man killed him.

After the events at Lake Victoria, the prehistoric school of blood-thirsty piranhas make their way into swimming pools, plumbing, and a newly opened water park.

A scuba diving instructor, her biochemist boyfriend, and her police chief ex-husband try to link a series of bizarre deaths to a mutant strain of piranha fish whose lair is a sunken freighter ship off a Caribbean island resort.

Young monster kids try to make peace between the world of humans and the world of the monsters.