In the year 2057, explorers on Titan discovered caches of exotic matter that, when activated by electricity, could warp the fabric of space. It would prove to be the greatest discovery in human history, allowing us to travel to the stars and join the interstellar community, the material was dubbed Meson-33, or M33.
Humanity used this technology to travel to the stars and colonize hundreds of star systems over the next century and humans became divided along more and more lines. We made violet contact with aliens in 2098 and humanity came back together to protect itself. In 2102 we made peacful contact with the same aliens, and joined forces with them and joined the local interstellar conglomerate.
M-33 primarily follows deep-space exploration vessel turned warship Virage and her crew's attempts to return to the Milky Way after being unwontedly taken to Triangulum 2.8 million lightyears away. The journey beyond our stars is a journey into our characters; discovering or rediscovering who they are. The further they journey into the galaxy the closer they get to their true selves, and the deeper they delve into their hearts of darkness. The restraints of real life physics must be addressed, and be addressed in a believable manner.
Ideally, the world will be developed and expansive enough to tell stories of the Milky Way as well.