Na svoj den rozhdenija Alisa letit v ekspeditsiju na opustevshuju planetu Koleida. Kogda-to naselenie planety pogiblo iz-za virusa kosmicheskoj chumy. Alisa otpravljaetsja v proshloe, chtoby obezvredit virus prezhde, chem on unichtozhit vse zhivoe na Koleide. Planetu Brodjaga, gde obitajut neverojatno zlobnye suschestva, porazil virus vrazhdy. I samoe strashnoe — chto ta zhe uchast zhdet Zemlju. Davnym-davno praviteli Brodjagi otpravili virus na Zemlju, sprjatav ego v lilovom share. Mashina vremeni perenosit Alisu v proshloe, v epokhu legend. Teper v ee rukakh sudba chelovechestva. V 1987 godu po povesti "Lilovyj shar" byl snjat odnoimennyj khudozhestvennyj film.
Kir Bulychev was a pen name of Igor Vsevolodovich Mozheiko, a Soviet Russian science fiction writer, critic, translator and historian of Lithuanian ancestry. His magnum opus is a children's science fiction series Alisa Selezneva, although most of his books are adult-oriented. His books were adapted for film, TV, and animation over 20 times – more than any other Russian science fiction author – and Bulychev himself wrote scripts for early adaptations. He began to write SF in 1965. He has translated numerous American SF stories into Russian. Winner of the ESFS Awards in 1984 as the "Best Short Story Writer". Winner of the Aelita award in 1997.