When the search for the supernatural brings Dipper and the rest of the crew on the Mystery Hack face to face with a creature beyond their wildest imagination, things start to get complicated... More than what he seems, the siren casts the crew's lives into turmoil, and it seems he's only there to make things difficult for them... yet there's something else going on beneath the surface... Demons and siren songs, creatures in the shadows and dark deals from the past. Will Dipper be able to restore order to chaos? Or will he be lured into the cold, dark waters? Will the song doom them all? Or will the siren find a reason to change his tune...

In an Alternate world Dipper and Mabel were raised amongst strange and wonderful th