Ambitious explorer Sir Lionel Frost is ridiculed by his peers for believing in myths and monsters the world over. After receiving a letter claiming to know the location of an undiscovered creature, the Missing Link, Frost sets out to prove everybody wrong and make himself famous. Upon discovering that the 8-foot tall, lonely creature sent the letter himself and is able to talk (maybe a little too much), the duo set out, along with free-spirited adventurer Adelina Fortnight, to find Mr. Links long-lost relatives in the fabled valley of Shangri-La all the while being pursued by villains determined to steer them from their path. This visually stunning animation explores themes of displacement and loneliness whilst proving that sometimes family can be found in the most unlikely of places.