A game of Holmes: Sherlock & Mycroft lasts seven turns (days of investigation). At the beginning of each day, famous characters extracted from the books of Arthur Conan Doyle appear in London.
Each player has three action tokens that move from one character to another to use their special abilities, knowing that a player can never have two tokens on the same character. Therefore, a character must be freed before reuse.
The abilities of each character allow them to obtain Evidence Cards or gain Investigation Tokens in multiple ways. The game has great replay value because it is not known whether a character with a specific ability will make their appearance on the board in the Day 1 or in the final Day 7. Each game is different!