SEAN plans for his "best birthday, ever!" as DB and GEN are closer to meeting their tiny neighbors with the help of AUNT B. IRIS and LILLY seek speedy advice from AUNTIE BUTTERFLY to help clear the way for their cherished traditional celebration.

Meow! Catarina looks for the source of her cats' injuries. Tiny neighbors look for ways to prevent intrusions from curious cats. Aunt-B helps neighbors discover a solution for all. DB and Gen attempt to help address neighborhood cat concerns. WYATT and WENDELL take a journey on the Toll Train to seek the advice of Auntie Butterfly.

Welcome to the neighborhood! DB moves into a new apartment in a new neighborhood and meets neighbor GEN - they become fast friends and together, they attempt to solve a neighborhood concern with the help of AUNT B, and other neighbors. ASH and ROWAN take us on a trip down the Faerie Boat Canal to seek the advice of AUNTIE BUTTERFLY.