Detective Eve Thirtyacre and Officer Emmy Moon are on the trail of a killer. With one murderous man behind bars, they gain information telling them that their serial killer is an identical twin, and his brother is still out there, looking to continue their killing spree.

Gemini is not talking. Trapped behind bars, Brian Michael Cook is known to be guilty of a long spree of homophobically motivated murders, however it now appears that he had some help along the way. With another suspect to investigate, Eve and Emmy find themselves back at the beginning, reworking the case in search of answers. As their quest for justice continues, can they find the elusive twin brother and close this evil case for good, or will they constantly be waiting for him to follow through on his threat, killing Eve for good and therefore finishing the cycle? Find out in...Trinity.