Grant, Jason and the rest of the TAPS team travel cross-country to Ione, California to investigate the enigmatic Preston Castle, built in 1894 as a halfway house of sorts for young boys that had spent time at San Quentin and Folsom prisons. Closed in 1960 and reopened to the public in 2001, there continue to be fresh claims of paranormal activity almost on a daily basis. The investigation begins as TAPS makes its way through the castle to obtain readings of those who have violently died on site. Early on, Grant believes he may have been beckoned - by name - by what sounds like a former student. The results of the amount of activity in this investigation leave the team perplexed.
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