During a flight across the skies of Galia 4 Alto and Ranka make an emergency landing due to equipment malfunction and discovered the wreckage of a first-generation Macross class ship called "Global" that belonged to the 117th Large Scale Research Fleet. Ranka begins to get flashbacks from her past which is linked to the Global. Soon thereafter, Ranka is kidnapped by unknown forces and Alto sets out to rescue her. Meanwhile, O'Connor has her own plans as Sheryl and Michel set out to look for Alto and Ranka.