Based on a story by filmmaker Poj Arnon, the plot involves an apartment complex in Thailand being overrun by vicious cobras.
The Intruder was the second highest grossing film in Thailand in its opening week being only beaten by Iron Man 2.
Later, a group of cobras invade the building which threatens the lives of the inhabitants: a young landlady Panin (Kwankao Savetawimon), her aunt Pai (Wasana Chalakorn) who has set up a snake shrine, Panin's doctor ex-boyfriend Sadayu (Akara Amarttayakul), his younger brother Vick (Peerawish Bunnag), snake specialist Chai (Thanatorn Oudsahakul), airline stewardess Jan (Chawwadee Chernok), three rock musicians, three teenagers, plus two-timing husband Ponnapa (Aungkana Timdee), his wife Mon (Sarocha Watittapan) and their young daughter Kij (Sukol Pongsathat).
Along with them is a TV reporter Paai (Apinya Sakuljaroensuk) who is secretly sending out clips of the gory events through her mobile phone.
[5] Variety gave a generally favorable review of The Intruders praising the energetic performance of the cast, as well as noting that the "effects are decent for this type of fare.