Myth and monsters investigator Sir Lionel Frost discovers the “Missing Link”, a surprisingly smart, charming creature of legend whom he dubs Mr. Link and who is the last of his kind.

Craving companionship, Mr. Link enlists Frost to help find his long-lost Yeti cousins. They embark on a hilarious, hair-raising journey accompanied by Adelina Fortnight, a freespirited adventurer who happens to have the only known map to their hidden destination.