A world where human emotions are used as energy. With certain emotions being easier to convert into certain types of energy.
It is discovered that memories hold a lot of energy and can be used as a form of battery energy. However, the trade of memories is considered illegal so a huge black market for it begins.
A man is in huge debt from a gambling addiction and begins to sell his memories until all his powerful, meaningful memories have been sold and he is left with his one most important memory. Does he sell it?