The Syncode

Joanne Hartwell is sent to London via the elder Holmes cousin Julian to hand off a top secret letter to Mycroft Holmes. Someone has infiltrated the ranks of the British Intelligence Services, and as a result are always one step ahead of them.

All known codes and ciphers are compromised. Joanne's double cipher 'Syncode' is used for communication between the Holmes's as they search for hidden cold war era technology involving a mad physicist. From an abandoned lab in the Bikini Atolls to an historic research base in Antarctica, the final answer lies in the remote desert wilderness of Australia.

Time is running out, as each day the enemy continues to gain knowledge of the valuable secrets that could end with a war between the world's most powerful nations.

As if that weren't enough, Joanne finds herself in the middle of a love triangle between Mycroft and his elder cousin Julian Holmes, further complicating things.

Notes:
Please read the Prequel to the Syncode first for character backgrounds.

The stories are also reposted on AO3 and fanfiction.net under CGRaines.