Whispers of the Deep - Emma Hamm

One of the many engineers that keep Beta, the city under the sea, running, Mira only wants to make her family proud and to prove herself worthy. She knows the mysterious city better than anyone and it’s her dream to help it flourish. Then, on a solo job in an abandoned section of the city, she encounters a monster of legend: an undine, a dangerous merman from an ancient civilization, long forgotten.