It is the American deep south half a century ago. In the background, a tree bears the "strange fruit" of a lynched black man, a barbed wire necklace around his neck. Lizzie Walker, the youngest in a long line of wilful women, is unpacking the past. It is a past full of memories, the melodies of Negro spirituals and the voices of those long dead: "In my family there's dead people hopping in and outa the conversation all the time."

One of those dead people is Lizzie's great-great-great grandmother Sojourner Truth, an illiterate black slave whose voice speaking out against slavery could not be silenced even when her bones were consigned to the back yard. Lizzie is listening to Sojourner, and in the process she is discovering her own voice.

Written 20 years ago but still fresh and urgent, Lisa Evans's remarkable play for children charts one young girl's experience as she takes her place in the burgeoning civil rights movement. "I am Lizzie Walker taking the name of Trouble because of the trouble behind, taking the name of Fighter because of the struggle ahead."

This may be an issue play, but it has none of the worthiness that normally dogs such drama for children. It sings with hope in the face of terrible family tragedy and dances with the comedy of white women desperate to maintain their privilege. Richard Shannon's production negotiates the serious and the mischievous with finesse. In an excellent cast Antonia Kemi Coker is outstanding as Lizzie's teenage sister Marguerite, a young woman with her jaw set firm as she marches into history.

· Until Friday. Box office: 020-8543 4888