Hey, I know this one! It's from WW 17. The formula is actually a cure for cancer - Lana invents it, and then Ambishun (love those transparent names) convinces her that drinking the formula has killed a man, in order to get her to sign over the rights (excuse me, the "responsibility for the crime") to him.
Etta, in an attempt to cheer Lana up, takes her hiking with the other girls on the Mountain of Fate, at the top of which blow the Winds of Time. You know. Just because. Naturally, they get caught in them and knocked back in time. Etta radios for Diana, who gets a time machine from Paula and chases after them.