Another attempt at a crawl, keeping in mind RogueLeader’s suggestions:

The Republic is in crisis.
Luke Skywalker, last of the
Jedi Knights and guardian of
galactic peace, has vanished.

In his absence, Imperial
worlds united under the
banner of the sinister
First Order have forged
a weapon to destroy the
Republic. To protect this
perilous secret, they have
vowed to destroy the Jedi
religion once and for all.

To prevent this atrocity,
the Republic supports
a covert Resistance to
find their long-lost Jedi,
and sends their most
daring pilot on a mission
to the edge of Imperial
space…

I’ve taken a bit of liberty in making Jakku near Imperial space, but I think this fits the style of the mission more than everything happening in the Republic and the FO being a purely incursionary force.