'Maruthanaatu Ilavarasi' is a well-woven story a few king (Veerappa) with two wives (one performed by Saraswathi and the opposite doesn't seem within the film!) and an evil-minded Minister (Chakrapani) whose sister is the youthful queen. The 2 change into pregnant and the evil genius persuades the king to consider that the senior queen poisoned the junior queen out of sheer jealousy; the king believes however takes no motion. The pissed off Minister tries to get rid of the pregnant queen, however she is saved by a courtier whom the Minister kills. The pregnant queen escapes many trials and provides beginning to a son (MGR). He grows up and meets a younger girl (Janaki) and her pal (Nagaratnam) and falls in love, unaware that she is a princess. Their love grows, however when he involves know that she is a princess, he distances himself from her. After many trials, the 2 come collectively and reside fortunately.