After Edward Nygma was captured by batman because of a crime at Gorman's house and send to Arkhem, he has been using all his time to plan his evil scheme and has developed a new identity...The Riddler.

You are also a prisoner in Arkhem though was for a different crime. Edward is seen unsocial with the other inmates, thus the chief ordered you to befriend him.

At gardening hour, you saw Edward digging the soil, clearly distracted. You approach him.