Seven sisters. Seven daughters of Poseidon. One ship. Three men. The sirens own the sea, but the men own its waves. Evamine has always been the black fish of the family - sticking out like a sore fin. Her opinions on humans are much more humane than that of her sisters...and especially to that of her father. Poseidon takes revenge on those who enters his waters, and the sirens suck the blood of his victims. But what happens when the youngest decides to befriend the very human she's ordered to kill?