There are three stories on this video:

In the first, Mary Marvel (played by Becca) is chloroformed, gagged, hogtied, and chloroformed again for good measure.  (She squirms around a lot too...)

She's tortured by covering her head in a suffocating plastic bag. but still our heroine won't submit to the villains demands.

She carried unconscious to a table and injects her with a drug to soften her up.  She struggles against her ties until the drug kicks in and forces her to tell the villain what he wants to know.

In the second story, SuperBecca is ball gagged and tied to a chair, and weakened by a kryptonite laser until she passes out. The villain blindfolds her and shoots her again to make sure she stays out.

When she awakens, she's cloth gagged and tied in a unique position, kneeling on the chair. Her costume is off her shoulders and pulled tight around her waist as she struggles.

In the third part, Becca is dressed in a short black skirt and a olive blouse, hose and heels. She is ball gagged and tied to a chair in an unusual way, showing off her fabulous legs.  After some struggling, her blouse is unbuttoned to show her black bra.