The beloved garden gnomes Gnomeo (voiced by James McAvoy) and Juliet (voiced by Emily Blunt) are back, this time embarking on a brand-new adventure to London. When Gnomeo and Juliet first arrive in the city with their family and friends, their biggest worry is whether their new garden will be ready in time for spring. However, they soon discover that someone is kidnapping gnomes all over the place. One day, upon returning home, they find that all the gnomes in their garden have disappeared! The only one who can help them is a gnome named Sherlock Gnomes (voiced by Johnny Depp). This famous detective, who has sworn to protect all of London’s garden gnomes, and his partner Watson (voiced by Chiwetel Ejiofor) begin investigating the case. This mystery will lead them on a fresh adventure! They will encounter many never-before-seen decorative characters and explore a hidden side of the city.