University Theatre presents ''The Memory of Water,'' by Shelagh Stevenson. Three sisters, each haunted by their own demons, gather at the home of their recently deceased mother and revisit the past. The sisters' memories interact with each other and show that, despite synchronicities of time and place, they cannot agree upon one unifying experience. They drift around their own islands of memory, unable to agree on one particular point, and yet are unified by their familial bond. Tickets are $12 for adults, $10 for seniors and non-UW-Superior students, and $2 for UW-Superior students. Group rates may be available. Tickets may be purchased at the Box Office in Holden Fine and Applied Arts Center.