"We're away from trouble now."
If there's one thing I can say it's that Ahsoka knows how to make an entrance. I wonder if that's a force skill?
During Ahsoka's investigation into whom the Sith Lord is -- that would be Vader, who she doesn't know is Anakin -- she uncovers the inquisitors' interest into... something. She doesn't know what it is; she just knows they're after something. Or somethings. She also knows that if the inquisitors want something, they probably shouldn't get to have it. At the least, the rebels ought to know what it is they're after.
She recruits Kanan and Ezra to help her find out what's going on.
There's a certain amount of tension that exists in this show that didn't exist in Clone Wars. We know what happens to Anakin and Obi-Wan and many of the other characters, but we don't know what happens to Ahsoka and she's not the star of this series. It's plausible that she could go at any time, though, at this point, there's a lot of audience investment in the character, so it makes for situations like The Phantom Menace. I mean, no one expected Qui-Gon to die.
For that matter, we don't have any confirmed future inclusion for any of the characters past Rogue One, so it can leave you guessing during an episode like this.
"You would question me, Seventh Sister?"
"Only when you're wrong."