Frequency.

Frequency is an interactive branching story. You will play the role of a lone, pragmatic ranger, named Noah. Noah is at home when suddenly hears something through the radio... a voice calling for help. That is Eliza. Eliza is in grave danger, someone is after her. The friends she was with are missing, she is alone, and her radio can only reach your frequency. You will help Eliza make tough decisions and face the consequences together. You will have a limited amount of time to make a choice. Fail to choose in time and one will be chosen for you randomly.