A lethal virus has infected Treasure Island,San Francisco and it is up to Captain Winter, a U.S. Army soldier working with the Center for Epidemic Research and Control (CERC) to stop the mysterious and deadly Pangu Virus from spreading farther. The Cepheus Protocol is an independently developed top-down RTS inspired by XCOM, Company of Heroes, and Parasite Eve. God knows what will become of the world if her or this infection spreads to the mainland.
For all her strengths, Chelsey is also a woman that tends to beat herself up as she suffers from anxiety and self-esteem issues, from years of mental abuse from her parents; her father, a successful restate agents, and mother an ad executive. Both felt their daughter could do more with her life, pushing her to be a doctor instead of a nurse. This has built a resentment against her parents 7 as Chelsey was hoping to leave them and move in with her boyfriend prior to the events of the San Francisco outbreak. The day before the outbreak, Chelsey was in Half Moon Bay, and after visiting the weekend with her grandmother went to the beach, as she typically did before catching the morning train back to San Francisco, she came across a sick man, dying on the beach. Unknown to Chelsey, as she rushed over to help him, he’d escaped the Voyager Dawn, a government ship disguised as an oil tanker. The man had been infected with the Pangu Virus, and as Chelsey attempted to treat him, she contracted the virus just before he died.
Following her police statement, she returned to San Francisco that same day and reported for work. During her shift, Chelsey became violently ill, unknowing beforehand she’d already infected dozens of patients with a refined version of the virus that had been mutated in her body. Sent home, Chelsey tried to sleep, but after her parents pestered her about a trivial matter, she went into a fit of rage and murdered both as all the years of trauma had boiled over, fed by the virus. Chelsey, coming to her senses ran away and disappeared into the interior of Treasure Island, just as the island was being closed by the authorities.