A singing-dancing Las Vegas waitress accidentally tripled in size becomes a Sin City showroom icon, falls in love with the scientist whose mishap made her a giant, then vows to rescue him when he's kidnapped by three mutual rivals.

SYNOPSIS:

Colleen Cossitt, a blonde singing-dancing waitress at the Bryson Casino on the Las Vegas Strip, takes best friend Meg Switlik to her job at the nearby Purple Pavilion gentlemen's club and sticks around for a meeting where smarmy owner Vito Cortez announces his Boston "organization" has bought a nearby casino, which will be converted to a Vegas nostalgia theme. It will include a showgirl revue run by wealthy widowed ex-chorus girl Cassandra Maitland. Colleen is interested, but Cassandra dismisses her as a candidate since she's only 5-foot-4 3/8.

Struggling older sister Maureen Cossitt says she just met Colleen's high school flame Bill Messmer, a 6-foot-7 basketball star turned engineering executive. (Colleen dotes on 10-year-old nephew Ivan Black because physical abuse by ex-husband Tim Whitman, whose gambling drained her bank account, has left her unable to have children.) At the Bryson, she vents about being short to scientist Keswick Fletcher, a longtime customer who owes Vito $154,000 for a gambling debt and is secretly wooing Cassandra. He tells Colleen he’s created a device, the Resizer, that can enlarge bodies proportionally. She visits his lab, a converted trucking warehouse, to see the machine, and decides to enlarge herself to 6-foot-2 (15 percent growth) the following day so she can become a showgirl and possibly woo Bill as well.

As the procedure begins, an enlarged cat escapes her cage, which causes Keswick to accidentally slide the growth rate to its maximum triple scale. Colleen’s body and clothes grow three times larger, to 16-foot-1 1/8. As the Resizer can only enlarge objects, not reduce them, she’s stuck at that stature, and Keswick fears her condition could be fatal. Meg, Maureen and Ivan come to the lab and stick by Colleen (Ivan loves that his aunt is now "fee-fi-fo-fum" size), unlike Bill, who wants nothing to do with her. She is devastated, but Keswick and aide Belinda Austin say they'll shelter her and monitor her health.

Keswick and Belinda unsuccessfully try to restore her over the next few weeks; as time goes by, it becomes apparent her gigantism won't kill her. When he and Colleen are alone one evening, they discover they’ve fallen in love. She affectionately calls him “my little Keswick,” and each promises to protect the other. Meanwhile, Cassandra frequents the Purple Pavilion, becoming closer to Tim and Vito; the latter sees a smartphone photo of a giant Colleen from his girlfriend Meg, who says it's a special effect.

The casino’s eccentric owner, Ernest Sanderson (who Vito is blackmailing on behalf of the Boston mob), wants to fire Colleen for a prolonged leave of absence. He finally finds her in the lab, but she gently coerces him into keeping her on the payroll. He signs her to a $1 million deal to headline at his showroom, with Keswick hired as her manager to assure she isn’t exploited. Cassandra visits the lab, discovers Keswick is now in love with a giant, then tells Tim and Vito about seeing her.

Unveiled to the public with a clumsy, aborted debut for which she publicly apologizes, Colleen soon becomes a hit attraction, a happy, gentle giant beloved by young and old in Sin City. She even performs family matinees on weekends. She repels another romantic challenge from Cassandra and dismisses Tim's pleas for money, saying she won’t lose her “giant virginity” to him. Tim moves in with Cassandra, both vowing revenge, and they align with Vito.

Colleen ends her romance with Keswick and fires him when she learns he owes a six-figure gambling sum. After he refuses Vito’s offer to use her show as collateral, not letting on he’s no longer her manager, Keswick is kidnapped by Vito’s henchmen. He is absent for several days, and Maureen reminds her sister he truly loves her. A now-lonely Colleen regrets letting him go and cries in her dressing room. Vito -- whose showgirl revue is struggling -- offers to free Keswick if he'll build his syndicate a Resizer, which Cassandra says she'll use to make herself and her showgirls giants.

Meg finds Keswick at Vito’s hideaway, learns of her boss's mob ties and tells Colleen where he’s held. She vows to rescue the scientist, but Meg says Colleen would be spotted as a giant and potentially endanger Keswick. She adds Belinda has altered the Resizer to reduce as well as enlarge, but the scientist's aide warns it hasn't been tested on humans and could jeopardize Colleen's showbiz career. Determined to save Keswick, she goes through with it anyway and is restored to her old 5-foot-4 3/8 height.

Colleen, Belinda, Maureen and Meg enter the hideaway to save Keswick. Vito’s gang, including Tim and Cassandra, pursue them, but when they reach the lab, Colleen (who learns to her dismay the new version of the Resizer can’t re-enlarge her) entangles them in her giant lingerie, which she drops from a second-story window.

Vito, Tim and Cassandra escape, entering the lab with Vito holding a gun, which Cassandra retrieves after a fight. She aims it at Keswick and orders him to make herself, Tim and Vito giants, not knowing the machine now only reduces rather than enlarges. Keswick complies, pretending to do it under coercion, and the three are shrunk to one-third scale. A frightened, tiny Vito agrees to waive Keswick’s debts after he and the others are hidden from the police. Colleen orders Tim not to physically abuse Cassandra, as he once abused her.

Colleen decides to retire, accepting Keswick’s marriage proposal the night of her farewell show at the Bryson. She closes with a love song to Keswick, just as the shrinking effect wears off and she bursts out of her gown back to triple scale; she and Keswick erroneously think she's willed herself back to giant size. (Vito, Tim and Cassandra return to normal, trapped inside a crib and playpen at the lab.) She tells Keswick if he doesn’t want to marry her now, she’ll understand, but he tells her he’ll keep his promise. “There’s no other man I’d rather lose my giant virginity to,” she privately says to him, then proudly announces her return to performing and their engagement to a delighted, sold-out crowd as Keswick gets a movie offer for his new fiancee.

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