Ok, so Lois Lane is interviewing this crazy scientist that has created a serum that will make a person super-strong AND invulnerable. He has just demonstrated this super-rabbit that he has created and then gives the serum to Lois.
Lois takes it home and discovers Lana Lang waiting on her doorstep, asking if she can spend the weekend since her apartment is being painted. Lois agrees and then tells Lana about this serum. Later Lana takes a bath and, of course, bathes in the serum.
She becomes super strong and invulnerable. Lois slaps Lana's face and almost breaks her hand! Lana ends up helping Superman do all sorts of charity stunts, but sometimes things go wrong, like her dress catches fire, or she gets shot with a bunch of kryptonite bullets whe she steps between Superman and some hoods.
Lois eventually decides that she should 'help' Lana and starts arranging all sorts of charity fundraisers where Lana pulls several locomotives or lifts a dozen strongmen over her head or juggles elephants, that sort of thing. But then no-one see Lana for a few months until Superman & Lois bust down Lana's dressing room door.
The phone ringing is the scientist calling Lois to say that he lost the formula for the serum and to 'never mind' about the whole thing. Does Lana stay this she-hulk she has become?
Nope, Superman can whip up an counteracting serum just like that! The best part? The look on Lois's face. THAT is one evil bitch!!!