Explanation:

The law of restitution is the law of gains-based recovery. It is to be contrasted with the law of compensation, which is the law of loss-based recovery. When a court orders restitution it orders the defendant to give up his/her gains to the claimant. If a minor has unjustly enriched himself equity demands that such property or goods be restored by minor. 
Example- X a minor makes a contract with D to sell his house and pays him 50000 rupees. The contract is held as void ab into by the court and the house is returned to X. X must return the Consideration for the house i.e. 50k back to D.