When a mysterious man claims to be their uncle and acquires court custody, Tia and Tony, aware of his evil intent, run away to prevent him from enslaving their unusual powers and to try to find someone who may know something about them.
Tia and Tony's visit to Earth is disrupted when Tony is kidnapped by a power-crazed doctor wishing to use the boy's special powers for his own evil purposes.
A boy with a computerlike mind, a girl with occult powers, and a black boy, all fleeing from deadly enemies, find they can achieve complete safety only with the help of a disembodied voice named Marlowe.
The last bear in the world wants to destroy mankind because man killed his entire species for sport. A boy defies the advice of his elders to seek out the bear and communicate with it.
