Nakshatratharattu

Sunil (Kunchako Boban), a christian, & Hema (Shalini), a Hindu, both orphans, fall in love & get married without knowing that their partner also was an orphan. After they are forced to come up with their parents to save their faces amongst their neighbors, they "adopt" an elderly couple, Menon (Thilakan) & Sreedevi (Bharathi), from a retirement home. Just as Sunil & Hema warm up to their new-found parents, the elderly couples' real son, Jayan (Saikumar), comes calling, claiming ownership. (Summary by iceblox)