Moschus has twin sons, Menaechmus and Sosicles. Moschus decides to take only one of the twins, Menaechmus, with him on a business trip, while the twins are still young. During the trip, Menaechmus is abducted and adopted by a businessman who lives in Epidamnus, separating the twins. Their father dies of sorrow and their grandfather changes Sosicles' name to Menaechmus (i.e., Menaechmus of Syracuse). When the twins are grown to manhood, Menaechmus of Syracuse sets out in search of his brother. He arrives in Epidamnus, unaware that his twin brother is there also.