| english title | Mr. Boo 4: Security Unlimited |
| original title | 摩登保鑣 |
| year | 1981 |
| country | Hong-Kong |
| production studio | Golden Harvest |
This is a story about security guard agency and its three agents - Michael, Sam and Ricky. Sam and Ricky are delivering a large sum of money to a bank when a robbery takes place under their nose. After a series hair-raising about hilarious chases., the agents get their men. With Michael and Sam giving their reward money to Ricky. They live haphazardly ever after.
(source: DVD Universe)
