The Ministry of Time is an autonomous and secret government institution that reports directly to the Presidency of the Government. As the secrets and the key to a possible president-to-president nuclear attack are kept in the US, the same is true of our Ministry: only kings, presidents, and an exclusive number of people know about it.
The passage to other times is done through doors guarded by the Ministry Patrols. Its objective: to detect and prevent any intruder from the past from reaching our present -or vice versa- in order to use History for their benefit. For this the Patrols will have to travel to the past and prevent them from achieving it.