When a lost space driver meets an alien rebel possessing the tech to locate home, she battles alongside him against his evil overlord to obtain it
(26W)
Or

A lost space captain battles alongside an alien rebel against his evil overlord in exchange for the radar tech to return home
(22W)

works for me

Thanks for the assistance, Kaz.

I've been using this lately:

Lost in deep space, the crew of a rescue ship must side with alien rebels and defeat ruthless conquerors to hopefully claim the advanced technology needed to return home.

I've offered you an edit before but here is another, thanks for reading mine.

The crew of a deep space rescue ship have one choice, reveal their home planet's location to alien marauders or remain lost in space forever.

Hmmm, cooperate seems a bit weak perhaps

Lost in deep space, the crew of a rescue ship must chose sides in an alien rebellion against another species if they wish to return ?home

Been using this to pitch with:

?Lost in deep space, the crew of a rescue ship must side with alien rebels to battle ruthless conquerors in exchange for the advanced technology needed to return home.?