Ancient China faces invasion by the barbarian hordes of Shan-Yu, and calls all able bodied men to arms to defend their Emperor. Young girl Mulan (voiced by Ming-Na Wen) disguises herself as a boy and joins up in her aged father's place, accompanied by her protectors: guardian dragon Mushu (Eddie Murphy) and lucky cricket Cri-kee. Mulan trains under the handsome Captain Shang (B.D. Wong, with Donny Osmond handling the singing), with whom she is soon falling in love, and shows herself to be a capable warrior. When Mulan is wounded in battle, however, the secret of her gender is discovered and she faces exposure and disgrace.

In celebration of 25 years of one of the world's most popular stage musicals, this event at London's O2 Arena sees a star-studded cast of over 500 actors and musicians performing songs from the show.