Ideas for my storyline and setting

1. Setting: India, Storyline: A 17 year old girl, who gets in trouble, and decides to runaway, but reaches somewhere she's not supposed to be

2. Setting: Amazon forest, Storyline: 2 sisters that came for camping with their school but ended up completing the biggest riddle.

3. Setting: China, Storyline: An engineer, who's experiment goes unexplainably wrong. Who new, it will lead him to a new success?

4. Setting: London, Storyline: 3 friends, that have come together and used their friendship to get out of a mystery.