Robinson Crusoe is an agent with Segment W.
So is Suriya Dinajara, aka Friday, but just as in the more famous adventure of the two related to us by Daniel Defoe, it is Crusoe that gets the attention though in the adventures described here, it is she who really deserves them (IMHO, of course).
In a blurb about the first recorded adventure, we are told: "Rescued from a deserted Caribbean island, 17-year-old Robinson Crusoe and his female friend, Friday, find themselves in late 1600s London, a bustling city that proves as treacherous for them to navigate as the remote island they just left behind. Thanks to their honed survival skills, Crusoe and Friday are recruited by a young writer named Daniel Defoe to work as agents for Segment W, a covert spy group that reports directly to the Crown."
In another advertising segment, we learn that the directive to recruit the pair explains that "they have learned to be resourceful and can hide in the shadows. They have no allegiances, no ties. And our enemies are closing in. We need Crusoe and Friday for our secret service. England's fate depends on it".
Obviously for those who would read Defoe's 'version' of Robinson Crusoe's life - and that of Friday - things have been altered quite a bit, apparently to protect the two secret agents. First is the age of both main characters being quite a bit younger than the classical interpretation. Second there is the amount of time that both were marooned on that tropical island - just three years in this version compared to more than twenty in the other. Third is the fact that our Friday is a young woman, Suriya, and not a man and she was running from her evil, murderous father, a pirate king, and not cannibals - though since both sought the death of Friday, it might not have been a factor if it were not for the fact that later Crusoe and Friday would come upon the despicable parent and that will lead to more troubles.
We learn that when Defoe first approached them about 'buying' the rights to their story, they were very reluctant to open themselves up to any attention but, unfortunately for them and good for Defoe, they are quite broke and in need of funds to just survive - life in London is not a bit like on the island. The relationship they will then establish with Defoe will open the way for his proposing they work in a clandestine manner for the government of King Charles II.
Plaguing the British monarchy and thus consuming much of the efforts of Crusoe and Friday is a nefarious covert organization known as the Circle of Thirteen, a group determined to bring down the government and put themselves in charge. The people in this group will prove quite resilient as they find ways to survive; when the operative pair think they have destroyed the cabal, part always remains to rebuild.
One wonderfully clever twist to the tales is the presence of a young genius who is asked over and again to come up with terrific gadgets and doodads which make the life of these two agents a bit easier - said gifted tinkerer being Sir Isaac Newton.