Treatment of the posterior crossbite (Brodie bite) case is always challenging for orthodontics. The case requires meticulous treatment planning and is often difficult and time-consuming to treat Brodie bite. This kind of malocclusion develops partially because of lingual tipping of the lower segments, and partially because of a lower jaw too small, relative to the maxilla. A young male 12 years of age came to the dental department with chief complaints of unable to chew food and with lower jaw teeth contained within the upper jaw. Clinical examination revealed class II div I malocclusion, increased overjet and lingually locked upper left lateral incisor with just one occlusal contact at the left first molar region (mandibular teeth contained within the maxillary dentition). Though there are various treatment options available such as extractions, expansion, dental arch compensation, or orthognathic surgery for treating Brodie bite, the best treatment option should be chosen, which requires proper diagnosis. This article discusses one such case that was diagnosed and planned as three-phase treatment with two modifications in mechanotherapy.