Robin learns a tough lesson when he disobeys Batman and goes on his own to pursue a mysterious case involving a young, lost girl by the name of Annie. Caught up in the belief that he could save Annie from an abusive father, Robin follows her to Gotham City’s sewers, where he encounters a disturbing realization about the way Annie and her father are “connected.”  Annie’s father is, in fact, the shapeshifting villain known as Clayface. To his horror, Robin learns that Annie is literally a “piece” of Clayface: a chunk of mud that formed into a small girl. To make matters worse, Clayface wants to “reunite” with Annie in order to be whole again, but will that mean Annie will cease to exist?