Reggie Rabbit and the Metro Mice

Reggie seems off his game. After successfully exposing another Masque plot, word is getting out about the crime-solving rabbit and his parakeet partner. One day, a small shy mouse called Mo reaches out to the pair for help; his home, the warren-like metro tunnels underneath Bearburgh, is under threat. Cracks are appearing in the structure of the metro and in the mouse community that inhabit it. Reggie and Pipsquark want to help the Metro Mice but do the Metro Mice want them?