Hi

Dear ______________________,
I must inform you that your life in is grave danger. All will be explained when you arrive at this address:
56 Trayler Street
Colorado
In the envelope there should be enough to fund your trip should you choose to use it. Please consider this offer, it's your life at stake.
- Miss Marvella, Director of Safe-Haven.

((this is a roleplay for superpowered children and teens))