The ten year old Nisse suffers from acute asthma and is rushed to the hospital. There he meets Lelle who is a bitter, lonely and seriously ill twelve-year-old. Lelle, who never gets any visits treats Nisse kindly. Lelle inaugurates Nisse in his secret plan to build a giant Zeppelin and steal the food available in the hospital's underground reserves.
| Actor | Role |
|---|---|
 Max VitaliLelle | Lelle |
 Oliver LoftéenNisse | Nisse |
 Gösta EkmanCarson | Carson |
 Kristina TörnqvistNurse Sara | Nurse Sara |
 Gunnel FredNisse's mother | Nisse's mother |
 Hans WigrenNisse's father | Nisse's father |
| UUlf EklundDoctor | Doctor |
| AAnna-Yrsa FaleniusNurse | Nurse |
 Weiron HolmbergJanitor | Janitor |
 Robert GustafssonYoung Man | Young Man |
| MMarie ÖhrnDaycare worker | Daycare worker |
 Bojan Westintesting nurse | testing nurse |
| JJenny Fogelquiststudent nurse | student nurse |
| OOlof RhodinRobinson | Robinson |
| KKim ÅströmNot listed | Not listed |
| BBo Holmqvistnewsreader | newsreader |