Lupin III competes with the Kisugi sisters to steal a triptych of paintings that once belonged to their father, and which hold the key to a long-unsolved mystery.Lupin III competes with the Kisugi sisters to steal a triptych of paintings that once belonged to their father, and which hold the key to a long-unsolved mystery.Lupin III competes with the Kisugi sisters to steal a triptych of paintings that once belonged to their father, and which hold the key to a long-unsolved mystery.