Every night, when the vampire bats fly off in search of nourishment, they avoid the dead tree where victims of the Great Sickness are left to die. Since the advent of this life-threatening disease, the bats pay strict attention to a new law: their nightly harvest of blood must be purified by fire. Beware those who break this law, like Desmine and Modus, careless... This animated film evokes the AIDS crisis. It pleads for tolerance, calls for prevention, and denounces the stigma attached to victims of this end-of-millenium scourge.