When Bart has problems with acting out, Marge and Homer take him to a child psychiatrist, who suggests that Bart should taking up drumming. Bart turns out to be a natural with the drums and much to the chagrin of Lisa; Bart is approached by jazz musicians, who want him in their band. Meanwhile, Lisa turns to rescuing animals as a way to deal with her jealousy and depression, over not being a member of a jazz band herself.