In early-2010s Kerala, a routine police inquiry in the quiet village of Kottayikonam uncovers a chilling pattern of missing women cases alternating between Kerala and rural Tamil Nadu, linked to a methodical killer using victims phones to lure the next. Led by determined SI Jayakrishnan (Vinayakan), the investigation faces obstacles until suspicions point to an unexpected suspect within their circle. This grounded, slow-burn thriller builds intense suspense through realistic procedural details, shocking revelations, and standout performances, especially Mammoottys menacing villain role.