Eight-year-old Poppy accidentally gets the key to Room 613 and finds her grandpa Tomas was wrongfully convicted. Together with single mom Nina and Julian, she digs up long-buried secrets of Mason Hotel. They uncover ledgers and tapes hidden in underground passages. Powerful Vera bribes Poppy with toys to destroy evidence covering fatal safety failures. Former hotel staff bravely testify in court, revealing the whole truth. Tomas’s conviction is overturned. The old room is rebuilt as a community workshop, and Poppy grows into a little guardian of truth.
