FIRST YOU SEE THEM. THEN YOU DISAPPEAR.

It started with the numbers. Spray-painted in red on street signs, outside homes and train stations.

Then came the messages. At random, thousands upon thousands of complete strangers received a text on their phones: 10 15 is coming. It wasn't a clue - it was a warning.

Last night, the first twelve were taken from their homes. No ransom, no note, just the numbers scrawled on their bedroom walls.

Discovering who - or what - is behind the kidnappings, and what the numbers could mean, quickly becomes paramount, as the entire country waits on high alert for news of their fate. Anyone could be responsible, and anyone could be next.

One thing is clear - this is only the beginning.