Sierra, the spoiled daughter of the Lycan King, loses her three mates to Lyra, a gentle stranger. Heartbroken and desperate, she volunteers to marry into the Mer Clan, leaving her kingdom behind. Three years later, she returns as a calm mother with a Mer mate and cub, only to face her regretful ex-mates. As secrets of their past "betrayal" unfold, Sierra must choose between letting go of old wounds or revisiting the love she once took for granted.