Originally property belongs to Mr. X. He died and left 5 legal heirs. The fifth legal heir executed General power of attorney for above said property in favour of my client Mr.Y. My client had divided the property into plots for real estate purpose and sold the plot no 122 to Mr.X without any consent from remaining 4 heirs only for his business use with oral agreement to return the property after 3 years. But he (Mr.Y) sold the plot no 122 to another person. My client talked to both of them and informed them that sale itself a void one and return the possession of property. But they denied. Now how can we get the possession back? What legal remedy is available to my client?