Warning — Humans Territory) is a 2018 Indian Tamil-language crime thriller film written and directed by debutant director Sarjun KM.

The film stars Sathyaraj, Varalaxmi Sarathkumar, Kishore, Vivek Rajgopal and Yogi Babu.

Principal photography of the film commenced at Pondicherry in December 2016 and shooting wrapped up in April 2017.

The film was released on 24 August 2018 on the eve of Varalakshmi Vratam and received poor reviews from the audience.

[1] Echarikkai starts with the backstory of David (Kishore), a 19-year-old young man and his 5-year-old nephew Thomas (Vivek Rajgopal).

During the past 15 years, Thomas, who lost both his parents and uncle, was living an extremely poor and indecent life.

Perumal is terrified and too scared to report the case to police, instead, he seeks the help of retired police officer Nataraj (Sathyaraj), who cannot come out of his house as he needs to take care of his daughter Pia (L. Alice), who has a rare medical condition and requires constant care.

Nataraj's doctor tells him that Pia can be cured in Singapore, but the operation would cost him Rs.

The film fell in place quickly as Varalaxmi and Kishore were frozen for major roles.

Debut cinematographer Sudarshan Srinivasan and Malayalam editor Karthik Jogesh were signed up for Cinematography and Editing respectively.

[2] The first schedule of filming happened in Sudeshi Mill, Pondicherry in December 2016 where portions involving the lead casts Varalaxmi, Kishore and Vivek were shot for over ten days.