Dr Roy (Naren) is back in his village from France after 23 years as requested by Fr Francis who brought him up during his childhood. Dr Roy does not know why Fr Francis has asked him to come back. Roy meets his childhood friend Meera (Meghna Raj) who is also a doctor. Dr Roy is a psychiatrist and Dr Meera Menon is a pediatrician. ‘Halleluiah’ is directed by debutant Sudhi Anna. The script and dialogues are written by Abhiman and Suni Raj. ‘Halleluiah’ is produced by K M Surendran under the banner of Barking Dogs Seldom Bite Films. K B Ganeshkumar, Sudheer Karamana, Sunil Sugatha, Kalabhavan Niyaz, Sashi Kalinga, Pashanam Shaji, Rajmohan Unnithan, Sajitha Madathil, Devi Ajith, Shobha Mohan, Gayatri, Jeeja Surendran, Master Eric, and Baby Durga also include the cast of 'Halleluiah.