Прощай, мы видимся с тобой в последний раз…

There were two people standing on the bridge: boy and girl. They smiled and looked into each other's eyes.
Suddenly the boy whispered: "I know everything."
The girl recoiled from him in horror.
A third participant of the drama appeared on the stage - a knife. A corpse fell and disappeared into the raging river. But this is the last day. And now...