So.... here’s the premise for an idea I might work on drumming up on further detail if I get a bit of interest.

4 or so characters awaken groggily onboard a spaceship. Standard alien abduction. Little to no memory of themselves or their past, just brief flashes which I will hand out. 
But!!! The big bit is that your oppressors/ captors are gone or dead. A few of you might recall some vague interactions with them but they are no more. 
You have an immensely huge and alien spacecraft all you yourselves with no idea how to pilot or control it, oh and it is still travelling through space.

There will be encounters and secrets both from within and from without the spaceship (aka your new home) as you slowly learn or redifine who you are.