One normal day, Numbuh 1 and his father Monty Uno are happily fishing outside, but in the mean time, Numbuh 86 and her Decommissioning Squad arrive and say Numbuh 1 is on the Schedule for decommissioning. Numbuh 1 tries to explain to Numbuh 86 that it's too early for him, but she won't listen. So Numbuh 1 took his father Monty Uno back to the Sector V treehouse, but he just found out Numbuh 2 ~ 5 are already taken away by Numbuh 86, along with the treehouse being taken away. Later some decommissioning agents find him, so he uses his home mail envelopes to escape.