Tragic hits the Christen household when Leo's father is diagnosed with Brain cancer. To get over the grief, Leo's father pushes himself into his work, which worsens his health. Things take a turn for the worse when both his parents leave him on the same day with nothing but a house filled with watches, books, and 4 letters:

VC39

Determined to find the meaning, Leon embarks on a journey around Europe with his father's favorite pocket watch. But unfortunately, every door he opens leaves him with more questions than answers.

Would he be able to unlock the mystery in time?