[4][5] Prabhakaran "Prabha", a daring and dashing cop, is suspended after he decides to rescue an informer instead of aborting that mission, going against the direct order of the Commissioner.
They decide to adopt Nisha, after observing how close she is to their family, thanks to Janani, Prabha's love interest, who works at the same orphanage.
As Prabha starts digging into the case, he learns that the kidnappings are connected to an attack at the Commissioner's office in 1993 by a gangster named Michael, who is actually Aadhi's father and also the mysterious leader.
After having learned about Prabha's identity, Michael kidnaps 20 children randomly in broad daylight and tells the parents to provide money for their safe return at a public restaurant.
[6] Tanya Ravichandran was cast in as the female lead opposite Atharvaa which marks their first collaboration while other actors and actresses like Arun Pandian, Munishkanth, Chinni Jayanth and Azhagam Perumal appear in other pivotal roles.
Ghibran composed the soundtrack and background score of the film while collaborating with actor Atharvaa and director Sam Anton for first time.
[15][16] M. Suganth of The Times of India gave 3/5 stars and wrote "Sam Anton teams up with Atharvaa again to give us an almost edge-of-the-seat action thriller that has enough smartness to keep us hooked".
[17] Behindwoods gave 2.5/5 stars and stated that "Trigger is a watchable action entertainer with a good social message.
"[18] Thinkal Menon of OTTplay gave 2/5 stars and wrote "Despite sufficient opportunities in hand to make an engaging action drama with ample dose of relatable emotions, makers couldn't cash in on it.
"[19] Navein Darshan of Cinema Express gave 2/5 stars and wrote "Trigger would have been the powerful entertainer it aspires to be if these characters were fleshed out well in a screenplay free of distractions.