According to all the teaching of the Bible, repentance is a change of one's mind toward sin. It is produced by godly sorrow for one's sins. The result of this change of mind toward sin will be a change of life. The son disobeyed his father. He then did what his father had asked him to do.
Repentance involves restitution.
If one has murdered another person, he can not restore that person back to life. He can, however, help the widow and children of the man he has killed. If one has stolen money from another person, when he repents, he must return the money he has stolen. Those who are not Christians must repent of their sins in order to be saved. Christians who have sinned also need to repent.