CHAPTER SIX San Francisco On Monday, Hannah made the biggest decision of her life. In response, her mother called a man named Dayo. And a day later, Dayo emailed Hannah a business class plane ticket. Destination: Lagos, Nigeria. On Thursday, a day before her departure, Hannah pushed a fork through bits of kale and tried to ignore the anxiety that had given her a sleepless night and an unproductive morning in the office. Despite her attempt, the nerves were impossible to disregard. She tossed the fork on the plate and huffed. “Not hungry?” Flo said, pulling round sunglasses from the crown of her head and over her narrowed eyes. “You’ve hardly eaten a thing.” “I don’t have much of an appetite today.” A fly buzzed above Hannah’s head. She swatted it and protected her drink with one hand over the rim. The salad, she didn’t bother to guard. She had given up on it, her growling stomach be damned. “Maybe we should have gotten a table inside.” Flo dipped sweet potato fries into a glop of ketchup. “It’s so damn hot today.” And the massive umbrella wedged in the middle of the round table did very little to ease their…