The sky gradually darkened, and a touch of sunset hung far in the sky.
"Let's go back." Chart said. It seemed that it was time to leave.
"Okay." Both Elaine and Kristen agreed.
Chart and Kristen were rowing a boat on the left and right. The boat slowly came back in the same way. They enjoyed the sunset and chatted from time to time. Then they went back leisurely.
It was getting late and it was getting dark. There were very few people sightseeing on the river. Only a few boats could be seen occasionally, and there was no boat in some sections of the river.
The boat was moving slowly. Suddenly, Chart heard something. He carefully recognized the faint sound, as if someone was calling for help.
"Someone is shouting for help over there!" The expression on Chart's face changed.
"Let's hurry up and see what's going on." Kristen's face turned serious.