Gaia and Luna are two inmates waiting for jail works in shackles (handcuffs, black box, waist chain and legirons). They are chanied together.
The guard comes for walking to working place in chain gang. The guard removes shackles to Gaia and Luna leaving them legirons.
Gaia and Luna start to work on the ground performing agricoltural works.
But they don't want work because it is very hard and it is too hot ...