Self-replicating entities that have evolved on different planets merge and proliferate exponentially. In search of more energy sources, they consume other stars.
A boy and a girl draw pictures on the wall with sticks made of black fish. One day a blue fish drifts ashore to them.
"You're right. There was a bug–I killed it." Late at night, only one voice wafts around the room. What lies on the other end of the telephone line is anyone's guess...