A horse-drawn covered wagon with a gaily painted canvas is wending its way along a little used trail in the West. At the reins is Carstairs, who, according to the legends on the sides of the van, is the maker of world famous medicines guaranteed to restore manliness, provide new vigor and increase stamina. In case that's not enough, free hot baths are included.
Traveling with Carstairs is his daughter, Jenny, a lovely young creature just beginning to experience the awakening of her being. They are enroute to the abandoned mining town of Golden Shaft, which in former better days was also the name of Carstairs' very profitable gold strike from which the town took its name. Along the road, the van overtakes a young man struggling with a heavy sack of potatoes. The youngster is Randy Vickers, an acquaintance of the Carstairs from the glorious past. Randy informs them that Golden Shaft is a ghost town, although Mr. Garrett still runs the saloon for the few farmers in the area.
from walking all day, Randy accepts Carstairs' invitation to crawl into the back of the wagon and take a nap. Randy does, but finds that Jenny, far from being asleep herself, has been nipping on daddy's elixir. Well fortified, they move on to more pleasurable explorations.
Garrett receives word of Carstairs' arrival with annoyance. He sends his henchman out to the supposedly played out mine with orders to hide the sluice and mining equipment. Garrett is so perturbed, he hasn't got time for Molly, the bosomy blonde madam of the run-down saloon. He's so annoyed, in fact, he can't-which perturbs Molly.
While Jenny feeds the horse, Carstairs and Randy slake their thirsts with a beer at Garrett's bar and try to figure out why Molly and her "girl," Zizi, are still in a town where there is no trade. Garrett arrives and Carstairs, feigning innocence, puts the same question to him.
At the mine, the sluice has been torn down. When Carstairs decides to take a walk out to the mine, Garrett tags along. A thin trail of mud in the otherwise dry dirt at the mine's entrance belies Garrett's insistence that no one has been near the mine for years.
In town, Randy and Jenny are rolling in the hay while Molly and Zizi discover something which has been smoldering between them and go at it. Later, Garrett and Molly invite Zizi to join them in a threesome. But when Garrett gets too close, Molly tells Zizi to get dressed and no service the henchmen, since its pay day. Now it is Molly's turn to send Garrett packing in the heat of passion. Garrett and his aide-de-camp, Grigqs, get into a fight about the spoils of the gold they have been mining but Griggs is no match for his tough boss. No one, Garrett decrees, is to flash any gold dust until Carstairs leaves town. But Carstairs is already on to the fact that Garrett has been stealing his gold.
The following morning, Carstairs and Randy go "hunting." Garrett sets out behind them. At the mine, they hear someone digging. Randy goes back to town to check for a hidden entrance into the mine. Molly has invited Jenny to her room to try on some fancy dresses, and Jenny has brought along a bottle of daddy's elixir. Soon the two ladies are high and free-wheeling. When Randy sticks his head into the room to look for a secret passage, the two women rape him in a wild and wonderful three-for-all that leaves Randy plumb tuckered out. Somehow, he manages to drag Jenny back to the wagon but she won't let him go. Garrett's stooges kidnap the two and hold them as hostages. Fortified by bottles of elixir, the men rape Jenny. Molly, watching from her room, is dragged into the scene. Soon, Molly, Jenny and Zizi are enjoying themselves and their captors. Alas, poor Randy is unconscious but when he comes to, he's definitely included.
Carstairs has chased Garrett back through the tunnels to the secret entrance which is in his office. Garrett takes one long look at the orgy and dashes back to the safe in his office. No time to join the fun, he reckons. Just as he removes the pokes of dust, Carstairs gets the drop on him, collects his gold and almost drops his shotgun at the sight of the erotic aftermath which greets him in the saloon. Molly asks Carstairs to take her and Zizi with him. He agrees. While the girls are collecting some clothes, they also find time to hide the gold dust they have received in payment from the men who worked the mine. Their hiding place is unique. They can hardly walk. At the last moment, Zizi decides to stay. As she stands to make her announcement, several of the small pokes of gold she had hidden break and a shower of gold falls from between her legs.
With that, Carstairs. Randy, Jenny and Molly dash from the saloon and clamber aboard the wagon. Molly, still nude, rides shotgun as Carstairs heads the wagon out of town and begins making plans for the future.