Lila has a Ph.D. in Oceanography and develops a process to purify water with algae plants. She writes in her journal about her childhood in a beach village in California and her studies of the sea. This until the day she time jumps during one of her open water dives after a fascinating discovery. She finds herself 500 years from now, in the year 2516 in a city called Nowtime, where everyone is well aware of who she is.