The musical tells the story of a princess afflicted by a constant weightlessness, unable to get her feet on the ground, both literally and metaphorically, until she finds a love that brings her down to earth.

When Althea's older brother is killed, her father tells her she must prepare to be queen, but she laughs and refuses, leading to a disheartened Lagobel army being slaughtered in battle with Sealand troops.

Althea's father tries various cruel cures to find her gravity, and tries to force her into an arranged marriage so she can provide a child to be a more suitable future monarch, but she escapes and flees to the wilderness that separates Lagobel and Sealand.

Amos expressed she was happy to be able to give The Light Princess a cast recording under these terms, because so many theatre musicals no longer get an album release because of the expense and logistics involved.

[6]The musical began previewing in the Lyttleton Theatre from 25 September 2013, with an official opening on 9 October starring Rosalie Craig in the titular role who was subsequently singled out as a stand-out performance.

It starred Rosalie Craig returning to the role of Althea, Craig's husband Hadley Fraser as Prince Digby, Trevor Dion Nicholas as King Darius, Gabrielle Brooks as Piper, Louis Maskell as Llewelyn, Norman Bowman as King Ignacio, Anna-Jane Casey as Sergeant at Arms, Laura Pitt-Pulford as Falconer and David Langham as Mr Flowers.

The musical received generally positive reviews, with the majority of critics praising Craig's spectacular lead performance,[10] the strong ensemble cast, the vivid and rich set design by Rae Smith, and the elaborate, imaginative choreography used to create the illusion of Althea floating in air.

[13] Time Out likewise gave it 4 stars, saying it was "a visual and technical tour de force with a title performance from Rosalie Craig that’ll blow your mind and melt your heart.

"[14] Another 4 star review came from What's On Stage, calling it an "unusual and delightful surprise" with an excellent ensemble led by a Craig in "one of the most extraordinary, vocally resourceful and physically triumphant performances ever seen in musical theatre.".

[15] The Evening Standard gave 4 stars, finding the musical "worth the wait" and a showcase for Amos as an artist and songwriter, with a stunningly good performance by Craig and gorgeous set design by Smith.

Edge stated: "Every so often you see something in the theatre so arresting, so unlike anything you’ve seen before, that you want to grab strangers in the street and tell them to book tickets [...] Bonkers, dazzling, lyrical, fun and sweet - Tori Amos's musical is a wonderful, unforgettable feast for the senses [...] All I know is I'd go again tomorrow, and again the day after that."

[19] The Guardian's review gave the musical 2 stars, citing a lack of emotional punch, finding Amos' score sometimes bland, and Adamson's narrative too meandering.

[20] The Stage enjoyed the set production, the superb ensemble and Amos' rich music, but felt the story might fail to capture any specific audience group, being perhaps too complex for children and too earnest for adults.