What is the relationship between the plaintiff and defendant, do they belong to the same family and there was never partition, and how it was acquired by the present owner, and when the plaintiff has come to know of such ownership and possession.
If it is undivided family, and ownership can be in any one of the co-sharers and possession is as trustee for the whole undivided family and not the defendant's own. There are umteen cases now, where the hardworking younger sons went to America, trusting their elder or younger brothers, sending money to father or brothers, and without the knowledge of the hardworking brother abroad, unworthy brothers managed to get some type of document from aged parents, mutated the property in their names, and those unfortunate brothers came to know of such alienation after several decades. The limitation for filing partition of undivided property is not 3 years as assumed. The limitation period commences from the date of learning the fraud or discovering the document hidden by the other party. In the case of minors, parents may sell away the land, and after the majority, someone might have informed about this alienation etc. A limitation is an issue of fact and issue of law, and when fraud is involved, the court uses their discretion for calculating the limitation period from date of knowledge. I know cases filed and won even after 50 years from the date of fraud.
My presumption is that must be undivided property and the plaintiff is a co-sharer and might have paid court fee as applicable for partition. Otherwise, no one takes the risk of filing case after 20 years without substance in the case as the plaintiff is an advocate and he can not file such a vexatious suit as a layman.